Ludger DDW 2019 poster

Ludger at Digestive Diseases Week 2019

San Diego, May 2019

Archana Shubhakar (Business Development Lead and Senior Scientist, Ludger Ltd) presented a poster titled “Serum N-glycomic biomarkers predict treatment escalation in Inflammatory Bowel Disease (IBD)” at the Digestive Diseases Week 2019 in San Diego.

The poster highlights the prediction of future need for surgical intervention or escalation of medical treatment using glycomics biomarkers in IBD patients. The poster presentation was well received and we would like to thank everyone who attended the event.

To view this and any of our other posters, please visit our Poster webpage.

Watch this space to find out more about our exciting IBD biomarker discovery project or sign-up to our Glycotechnology News service for regular updates on this and other R&D and medical glycomics projects at Ludger.


Milan, May 2019

Ludger DDW 2019 poster

The first annual NanoCarb consortium event funded by Marie Skłodowska Curie ITN EU project brought together expert principal investigators and early stage researchers (ESRs) to explore applications in advanced nanomedicine using Glyco-Nanoparticles. The event was hosted by Dr. Luigi Ley (University of Milan) and Laura Polito (The Institute of Molecular Science and Technologies).

The event was inaugurated with a session lead by Helen Williamson (Horizons Unleashed) by introducing the ESRs to a leadership framework and career development. A shared symposium with the ITN consortium GlycoVax ( over two days allowed speakers from both consortiums to use the opportunity to disseminate their work focusing on nanoparticle technologies and vaccine development. The NanoCarb ESR’s were given a platform to present to the consortium about their career journeys so far and the opportunity to summarize the focus of their upcoming projects for the next three years.

For more information on the NanoCarb project and our other collaborations, please visit our R&D webpages.


Ludger DDW 2019 poster

Amsterdam, May 2019

The final annual GlycoCan consortium symposium funded by Marie Skłodowska Curie ITN EU project was hosted by Prof. Dr. Govert Somsen and Dr. Ing. Sandra van Vliet at the Vrijie University in Amsterdam. The symposium focused on colorectal cancer research and included presentations from four guest speakers who are experts in the field. All the early stage researchers (ESRs) who are part of the consortium also shared their interesting research on colorectal cancer. Maximilianos Kotsias (ESR, Ludger Ltd) presented his work on the development of “Automated techniques for assessment of novel O-linked glycan-associated biomarkers from colorectal cancer tissues”. The event also included training for the ESRs which was managed by Dr Daniel Spencer (Head of Development, Ludger Ltd) and Helen Williamson (Horizons Unleashed), covering modules including stakeholder management (Helen Williamson) and a career development module lead by Craig Jackson (ESS Holdings).

We would like to thank everyone for their participation and help to make the event a great success.

For more information on our collaborative programs, please visit our Research and Development webpages.

Ludger participation at the 4th Canadian Glycomics Symposium

Banff, May 2019

Ludger sponsorship brochure at Canadian Glycomics Symposium

Ludger are very pleased to have helped with sponsorship for the 4th Canadian Glycomics Symposium May 15-19th in Banff, Canada, organised by the Canadian Glycomics Network (GlycoNet). As part of our participation we provided a brochure introducing the attendees to Ludger’s glycomics technology and services.

New Product Launch: Ludger Glycan Purification Cartridges

Oxford, May 2019

Ludger EC50 Clean up cartridges for glycan purification

We are excited to announce the launch of Ludger’s new glycan purification cartridges (catalogue no. LC-EC50-24). These cartridges have been designed to purify glycans from non-carbohydrate material including salts, proteins and detergents by electronic interaction of the glycans with the surface of the cartridge.

Purification of glycans can be performed using LC-EC50-24 cartridges in your workflow:

  • After enzymatic or chemical release of glycans from glycoproteins.
  • After exoglycosidases (enzymatic) digestion of glycans to release individual monosaccharides to confirm glycan identity and structure.
  • Before and after glycan labelling using fluorescent tags such as 2-aminobenzamide acid (2-AB) and 2-aminobenzoic acid (2-AA).

A wide range of glycans including N-linked and O-linked type oligosaccharides, tri-saccharides and larger structures can be purified using LC-EC50-24 cartridges and further analysed using orthogonal techniques.

For more information, please view our presentation by visiting:

If you have any questions or to request a quotation, please contact us at

CarboMet Workshop: Creating and Using Glycans in Precision Work

Leiden, July 2019

Ludger Carbomet Workshop

Ludger is organising a one day training workshop in Leiden, NL on July 5th (following EuroCarb2019) as part of their involvement as an industry partner in the CarboMet consortium (

The workshop will focus on the current state of commercial glycans used to support precision work. We will overview the classes, uses and manufacture of currently available glycan standards for qualitative and quantitative glycoanalysis work. Finally, we will summarise our thoughts on how glycochemists could enhance the repertoire of commercially-available glycan standards in order to aid development and manufacturing in the biopharmaceutical and precision medicine bioindustry sectors where the exploitation of carbohydrates will have huge impact. We will use interactive exercises which will include the introduction and use of the 'business model canvas'. The workshop will be led by Jenifer Hendel (Senior Scientist at Ludger Ltd) and Daniel Spencer (a member of the CarboMet organisational committee and Head of Development at Ludger Ltd).

For more information about the workshop and to register for this event, please visit:

A4B Leadership and Glycan Analysis Workshop

Oxford, March 2019

Ludger A4B workshop

Ludger Ltd and Horizons Unleashed Ltd. are very pleased to have run a greatly successful workshop for the Analytics for Biologics (A4B) Marie Skłodowska Curie consortium early stage researchers (ESR). The ESRs explored their natural leadership styles and planned for the future. They attended a series of lectures on the importance of the role of glycans in biopharmaceutical efficacy and safety and how to characterise them. In addition, they spent two days in Ludger’s training laboratory learning how to release glycans, fluorophore label and analyse samples using LC-MS systems. Feedback from the ESRs was excellent and we loved having them visit us!

The Analytics for Biologics consortium aims to train the next generation of independent thinking researchers in the science of producing the most effective and safe biopharmaceuticals. Ludger’s focus is on getting a deeper understanding of glycosylation profiles of biopharma drugs with an aim of producing faster and better methods of characterisation aiding the drug developers in shaping their biologics to improve both their safety and function.

For more information on the A4B project and our other collaborations, please visit our R&D webpages

Ludger A4B workshop logos

Top 10 Presentation Award to Ludger Scientist at ECCO Conference

Copenhagen, March 2019

© European Crohn’s and Colitis Organisation

Archana Shubhakar (Ludger Senior Scientist) attended the 14th European Crohn’s and Colitis Organization (ECCO) conference held at the Bella Centre in Copenhagen, Denmark.

Archana presented a talk entitled “Serum N-Glycomic Biomarkers Predict Treatment Escalation in Inflammatory Bowel Disease (IBD)” at the speed abstracting digital oral presentation. Her talk was well received and she won the best abstract presentation award for the ‘Mechanisms of intestinal inflammation’ session. The inset picture from the the 14th Congress of ECCO, shows Archana (second from right) receiving the award at the presentation ceremony.

Watch this space to find out more about our exciting IBD biomarker discovery project or sign-up to our Glycotechnology News service for regular updates on this and other R&D and medical glycomics projects at Ludger.

Ludger at RCSI Research Day and Irish Laboratory Awards

Ludger-Nanocarb Irish Laboratory Awards

Dublin, March 2019

Dr Daniel Spencer, Head of Development (Ludger) visited the laboratories of our collaborator Dr Marco Monopoli, STAR Research Lecturer at the Royal College of Surgeons in Ireland (RCSI) and attended the RCSI Research Day 2019. Marco presented an excellent talk entitled “Horizon 2020 European Training Network (ETN) ‘NanoCarb’“ where he described this new, exciting EU Marie Skłodowska Curie PhD programme. He also highlighted the collaborative work with Ludger focusing on glyco-production, chemoenzymatic modification of large molecules, nanoparticle handling and purification techniques.

In addition, Marco’s laboratory was nominated in the category of “Best Irish start-up laboratory” at the Irish Laboratory Awards 2019 - Gala event held at The Ballsbridge Hotel, Dublin. Marco and Daniel attended this gala event with the some of the best lab groups in Ireland. The inset picture shows Daniel (left) and Marco (right) networking and enjoying the gala event.

For more information on this and our other collaborations, please visit our R&D webpages

‘Implementation of Glycan Standards into a Glycan Analysis Workflow’ talk presented in Dublin, Ireland

Dublin, February 2019

ludger publications

Michael Butler the Chief Scientific Officer at the National Institute for Bioprocessing Research & Training (NIBRT) institute in Dublin invited Rad Kozak, Head of Glycoprofiling (Ludger) to present a talk on the importance and significance of glycan standards.

Rad’s talk focused on emphasizing the need to include and implement the use of system suitability standards, reference standards, process standards as well as quantitative glycan standards for robust and reliable glycosylation analysis. The talk was well received by the contract bioanalytical services group and the research group at NIBRT.

For more information regarding Ludger’s system suitability standards and controls please visit our feature page:

And for any enquiries or to request a quotation, please contact us at:

Publication: Improved and semi-automated reductive β-elimination workflow for higher throughput protein O-glycosylation analysis

ludger publications

Oxford, February 2019

A study by groups at Ludger and Leiden University Medical Centre as part of the GlyCoCan grant, has reported a largely automated system for high-throughput protein O-glycosylation analysis. Adapting reductive β-elimination release of O-glycans to a 96-well plate system allows the method to be performed on a liquid handling robot enabling characterization and relative quantitation of O-glycans from commercially available standards. The method, which was validated according to the ICH (Q2) R1 guidelines for the validation of analytical procedures, produced rapid and accurate data, and has the potential to be utilized for O-glycan characterization of biological samples, biopharmaceuticals as well as biomarker discovery.

This was recently published in PLOS One:
Kotsias M, Kozak RP, Gardner RA, Wuhrer M, Spencer DIR. Improved and semi-automated reductive β-elimination workflow for higher throughput protein O-glycosylation analysis. PLoS One. 2019;14(1):e0210759. Published 2019 Jan 17. doi:10.1371/journal.pone.0210759

For more information on this and our other publications, please visit our Publications webpage.

Publication: Colorectal cancer study using CRISPR technology

Oxford, January 2019

ludger publications

A study by groups at Ludger and Amsterdam UMC as part of the GlyCoCan grant, has demonstrated the altered expression of fucosyltransferases in colorectal cancer cells and its impact on N-glycosylation. Using CRISPR-dCas9-VPR technology to augment glycosyltransferase expression, resulted in a change of N-glycosylation at the cell surface. The findings show that exploitation of the CRISPR-dCas9-VPR system can provide a better insight into malignant cell transformation and how it is associated with tumor progression, metastasis and resistance to chemotherapy. This was recently published in Glycobiology.

Transcriptional activation of fucosyltransferase (FUT) genes using the CRISPR-dCas9-VPR technology reveals potent N-glycome alterations in colorectal cancer cells. Blanas A, Cornelissen LAM, Kotsias M, van der Horst JC, van de Vrugt HJ, Kalay H, Spencer DIR, Kozak RP, van Vliet SJ. Glycobiology. 2018 Nov 22. doi: 10.1093/glycob/cwy096

To view this and others, please visit our Ludger Publications webpage.

Updated clean-up and labeling technology tables

Oxford, January 2019

We have updated our LudgerClean and LudgerTag chooser tables to incorporate all of the clean-up and labeling technologies that we offer. This should make it easier to select the most appropriate kits for your needs but of course you can always contact us directly if you have questions.

ludger clean-up technology table ludger labeling technology table

Visit our Clean-up or Labeling featured pages to view the tables and more information

GlySign Grant mid-term review meeting and workshop

Oxford, December 2018

ludger glysign workshop

The Mid-Term EU review meeting and training workshop for the GlySign project took place at Leiden University Medical College (LUMC) from 10-14 December (Leiden, NL). This was attended by Early Stage Researchers (ESRs), Senior Researchers involved in the project from beneficiary institutes and partner organizations, the EU project monitoring officer and the EU appointed scientific reviewer. The ESRs gave oral presentations of their work to date during this session, provided feedback to the EU officer and appointed reviewer and finally the consortium received feedback from the same reviewers. In addition there were training workshops for the ESRs on the following topics:

Biologicals for the Clinic - (led by Ludger Ltd and LUMC) – the ESRs presented reviews of the commercialization of different classes of biologicals for clinical use, followed by round table discussions of each sector. Other areas covered included: how to investigate Erythropoietin glycosylation using HILIC-mass spectrometry of fluorophore labelled glycans, how human derived immunoglobulins are produced for use in the clinic at the Sanquin Institute and some of the essentials for designing a workflow for producing and analyzing a biological.

Quality Management (led by Ludger Ltd and Horizons Unleashed Ltd.) - They also learnt some of the aspects of assuring consistent and accurate effectiveness of biological assays with a review of the ICHQ2(R1) guidelines for validation of an analytical assay and learnt about efficient ways of root cause analysis to help them troubleshoot when things go wrong in the lab.

Scientific Writing (led by LUMC) – An informative session on writing a scientific paper and how to compose a scientific journal rebuttal letter.

For more information on our collaborative programs, please visit our Research and Development webpages.

PhD position available - NanoCarb

Oxford, December 2018

ludger nanocarb project

NanoCarb Project - Glyco-Nanoparticles for Applications in Advanced Nanomedicine -

Applications are invited for a PhD position on the Development of purification and modification strategies of N-type glycopeptide and glycan moieties for use as nanoparticle activity enhancers to be carried out under the supervision of Dr. Daniel Spencer at Ludger Ltd, Oxford, UK with the PhD registered with Dr Marco Monopoli at the Royal College of Surgeons in Ireland (RCSI). The project will focus on the purification of N-glycopeptides and N-glycans from natural sources in up to gram quantities. These compounds will then be modified using enzymatic techniques to incorporate 2-3 and 2-6 sialic acid linkages, including both NeuAc and NeuGc forms with O-acetylation. Additionally, modification of branched glycans to incorporate antennary fucosylation such as the sialyl-Lewis-X moiety will also be explored.

The research project will enable the candidate to greatly develop their experience in the fields of glyco-production, chemoenzymatic modification of large molecules, and purification techniques. In addition, a small portion of the project will allow the candidate to gain introductory experience in surface chemistry and nanoparticle handling. During the PhD programme, the candidate will carry out secondments with academic partners.

This is one of 15 PhD positions (Early Stage Researchers [ESRs]) open in the recently granted Marie Curie European Training Network (MC-ETN) project NanoCarb - Glyco-Nanoparticles for Applications in Advanced Nanomedicine. NanoCarb is a multidisciplinary consortium including universities, research centres and SMEs with broad expertise ranging from nanotechnology, carbohydrate chemistry, glycoprofiling and in vitro/in vivo screening specialists.

For more information on the project and how to submit an application, please visit our posting on
Application deadline: Thurs 13th December, 2018

If you have any further questions please contact Daniel Spencer.

glyShape presentation - T1 cartridges

Oxford, November 2018

ludger t1 cleanup cartridges - glyshape presentation

We have produced an informative slide presentation, part of our glyShape series for biopharmaceutical glycosylation, to explain the features and benefits of using LudgerClean T1 cartridges in your workflow. LC-T1 cartridges can be used to clean up samples after labelling with 2-AB, 2-AA or APTS. Clean up is completed within 30min for a single sample; 2 hours for 96 samples. The presentation also includes a video with step by step instructions.

To view, please visit

Glycan Analysis Services

Ludger Glycan Analysis Services

Oxford, November 2018

Dr Louise Royle retired in October after being with Ludger for over 10 years.
We thank her for her hard work and dedication during this time and wish her well in the future. We are pleased to announce that Dr Rad Kozak will be taking her place as Head of Glycoprofiling. Rad says, “I am excited to take on this role and very much look forward to the challenge ahead. Our philosophy is to work with clients in a partnership offering dedicated tailored solutions to ensure a successful delivery of the required information. The services we provide can help answer questions about the structures of glycans at all stages of the drug lifecycle – from QbD studies to regulatory submissions, comparability studies,

Please contact us if you would like to find out more about our custom analytical services, and visit our Glycan Analysis webpage for more information.

Louise Royle, pictured with glycan analysis colleagues
Dr Jenifer Hendel and Dr Rad Kozak

CyberEssentials accreditation

Oxford, November 2018

Ludger Cyber Essentials Accreditation

We are pleased to announce that in October 2018, Ludger achieved Cyber Essentials accreditation. Cyber Essentials is a government-backed and industry-supported scheme to guide businesses in protecting themselves against cyber threats. This accreditation demonstrates Ludger’s commitment to security and our ability to defend both our organisation’s and customers’ critical data against prevalent cyber threats.

Prize winning poster at ICS 2018

Oxford, October 2018

ludger glycan standards poster

Dr. Jenifer Hendel attended the 29th International Carbohydrate Symposium in Lisbon, July 15-19th.

Jenifer’s poster entitled ‘Glycan Standards as Key Tools for Robust and Reliable Analysis of Glycoproteins’ was well received and she would like to thank everyone for the engaged conversations.

The journal of Organic & Biomolecular Chemistry also awarded it the Chemical Biology Poster Prize.

To view this and any of our other posters, please visit our Posters webpage

Introducing our glyShape presentation series

Oxford, September 2018

ludger glyshape presentation series

GlyShape presentations have been created for our clients in the biopharmaceutical industry to share Ludger's expertise and demonstrate how our systems can be integrated into labs as part of the drug development process. The series will provide useful overviews of glycan analysis methodologies and instruction guides for key technologies.

The first in this series introduces our V-Tag technology for N-glycan release and labeling. It includes a video that provides clear step-by-step instructions on how to perform the method using the LT-VTAG-C30 kit.

To view the presentation and for more information, please visit:

We'll have more presentations to follow. Sign-up to our Glycotechnology News service for regular updates.

New Product Launch -
V-Tag Glycan Release and Labeling Kit

Oxford, August 2018

ludger v-tag glycan release and labeling kit

We are excited to announce the launch of our V-Tag glycan kit which enables release of N-glycans from glycoproteins, N-glycan labeling and clean up within 1 hour for a single IgG type sample and 2 hours for 30 IgG type samples (timing for release by PNGase F might need to be adjusted for complex type samples). The glycans are then ready for analysis by (U)HPLC. Also, once labeled with V-Tag the glycans can be incubated with exoglycosidases to allow for structure assignment.

For more information and to view our presentation visit our
N-Glycan Labeling Feature Page

Cat # LT-VTAG-C30

If you have any questions or to request a quotation, please contact us at:

Joint GlyCoCan and GlySign Business Process and Quality Management Workshop

Oxford, July 2018

ludger horizons unleashed glysign glycocan workshop ludger horizons unleashed glysign glycocan workshop

From 15-18th of May 2018 Ludger hosted the joint GlySign EID and GlyCoCan ITN workshop at the Culham Science Centre, UK. Course Leads: Daniel Spencer from Ludger Ltd and Helen Williamson from Horizons Unleashed Ltd.

Early Stage Researchers from the Marie Skłodowska Curie Actions projects GlySign EID and GlyCoCan ITN attended this workshop to learn about business processes such at the Business Model Canvas and the Value Proposition Canvas and explore how the tools can be useful in managing successful outcomes from their own PhD projects. In addition to this they also learnt about the value of robust quality management within an organisation. The workshop included seminars, interactive discussions, having a go at being a drinks manufacturer entrepreneur and a visit to a real food manufacturing company.

We would like to thank everyone for their participation and help to make the event a great success.

For more information on the GlySign and GlyCoCan projects, please visit our Research and Development for Medical Glycomics webpage.

ludger, horizons unleashed, glysign, glycocan

'New Publication in Glycoconjugate Journal on Automated glycomic profiling'

Oxford, July 2018

ludger glycoconjugate journal publication

A successful Business Interaction Voucher funded by IB Carb ( was used to strengthen the glycomics collaboration between lmperial College London and Ludger Ltd. This has resulted in publishing the following article titled “Towards automation of glycomic profiling of complex biological materials” by Shubhakar et al. in the Glycoconjugate journal.

This paper compares the performance of an automated plate based method for N-glycan release and permethylation of glycans derived from mouse lung and kidney tissues to established standard glycomic protocols using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The study revealed that the automated workflow is highly repeatable and it shows highly comparable MALDI-TOF-MS N- and O-glycan profiles of complex heterogeneous glycoproteins when compared with the standard protocol.

The key advantages of using the automated sample processing steps include reduced sample preparation times, low sample volumes needed for processing, it eliminates the need for performing the labour intensive steps, minimises hands-on-time, increases sample throughput and this set up has also shown immense potential for multiplexing, making the automated samples processing method convenient, scalable, fast and reproducible.

Ludger’s LT-PERMET-96 kit was used for derivatising these complex biological samples. For more information on the LudgerTag Permethylation kits and to view the presentation on our technology, please visit our Permethylation webpage.

Pubmed link: Glycoconj J. 2018 Jun 16. doi: 10.1007/s10719-018-9825-8

'How well is your column performing?'

Oxford, June 2018

ludger application note on column performance

No matter what type of chromatography you are using (HILIC-LC for glycan GU, WAX-LC for glycan charge; RP-LC for sialic acid ormonosaccharide analysis) it is good practice to run a regular system suitability check.

Are you tracking your column performance?
If not, please see our Ludger Application Note for guidance.

And don't hesitate to contact us for more information at:

Monosaccharide kit – new packaging

Oxford, May 2018

We are transitioning to new packaging for some of our kits, starting with our monosaccharide kit, LT-MONO-96. The new black boxes are shrink-wrapped and replace the plastic boxes (shown below, left).

We are excited about this new development as we believe this to be an improvement to the previous packaging. We have re-designed our labels and have also listed kit contents on the inside of the lid (with storage temperature guidance for each component).

Please contact us with any questions regarding.

Lugder Monosaccharide Kit - New Packaging Lugder Monosaccharide Kit - Interior Label

Glyshape seminars in Shanghai, China

Oxford, May 2018

Lugder Glyshape Seminar Shanghai, China Lugder Glyshape Seminar Shanghai, China

Daryl Fernandes, Chief Executive gave two seminars in Shanghai, China in March to representatives of biopharmaceutical companies and academia. The seminars were entitled “Ludger GlyShape Quality by Design”.

The seminars focused on how we are able to help companies develop biopharmaceuticals by understanding and optimizing glycosylation. Following his visit to Shanghai, Daryl visited clients in South Korea.

“It was a pleasure for me to visit Shanghai again and meet scientists from CFDA and biopharma companies across China. This was the second seminar we’ve held on the GlyShape China programme. It gave me an opportunity to further understand the needs of Chinese drug developers and regulators. I look forward to working closely with my colleagues over the coming years to help Chinese scientists develop and manufacture world-class biologic drugs that are safe, effective and affordable for patients and also very profitable for the companies.” - Daryl Fernandes

Please contact us if you wish to hear more about this.

Ludger at Euro Biosimilars Congress 2018

Oxford, April 2018

Lugder Procainamide Timeline

Archana Shubhakar (Senior Scientist) will be attending Euro Biosimilars Congress 2018 in Rome, Italy. She will be presenting a talk entitled, Automated permethylation for glycosylation analysis of biologics using MALDI-TOF-MS, and moderating Day 1 sessions.

Please let us know if you will also be attending and would like to meet.

For more information on Euro Biosimilars 2018 and the programme schedule, visit:

Procainamide Workflow - Sample preparation within 1 day

Oxford, April 2018

Lugder Procainamide Timeline

We have added the following information to our procainamide webpage and presentation:

  • An updated workflow for sample preparation (N-or O-glycan analysis)
  • Timings for N-glycan analysis of 96 samples
  • 4 peer-reviewed papers using this technology
  • A full list of products to use when performing N- or O-glycan analysis

To view the updated webpage and presentation please visit:

Analysis of Intact Released Glycans

Lugder Glycan AnalysisOxford, March 2018

We have recently added a short slideshow on intact released glycan analysis to our website. This demonstrates our analytical approach, with example workflows and data for IgG and EPO.

Please take a look by visiting our Glycan Analysis webpages

ISO accreditation

Lugder ISO 9001:2015Oxford, March 2018

We are pleased to report that Ludger has achieved accreditation to ISO9001:2015. This is the latest standard specifying requirements for a quality management system when an organization:

a) needs to demonstrate its ability to consistently provide products and services that meet customer requirements, and
b) aims to enhance customer satisfaction through the effective application of the system, including processes for improvement of the system and the assurance of conformity to customer requirements.

For more information, visit our 'About Us' page

‘IgE glycoforms’ paper published in Journal of Allergy and Clinical Immunology

Oxford, March 2018

Ludger IgE JACI publicationFrom our collaboration with Kings College London, as part of the ‘GlycoShape: Defining and designing altered IgE glycoforms’ project, we are pleased to announce the forthcoming publication of a paper in the Journal of Allergy and Clinical Immunology.

This paper describes the development of a tool to produce therapeutic IgE at high yields. Anti-tumour IgE has been demonstrated in a number of studies but it has been a challenge to produce of high enough yields for preclinical and clinical studies. Once the high yield recombinant IgE was produced, analyses at Ludger were performed to assess the glycosylation profile, and these revealed the importance of Man5 glycans in antibody binding and functionality. This study, using IgE as an example, has demonstrated how novel antibody therapies can be developed with enhanced effector functions.

Citation: Crescioli S, Chiaruttini G, Mele S, Ilieva KM, Pellizzari G, Spencer DIR, Gardner RA, Lacy KE, Spicer JF, Tutt ANJ, Wagner GK, Karagiannis SN. Engineering and stable production of recombinant IgE for cancer immunotherapy and AllergoOncology. J Allergy Clin Immunol. 2018 Jan 19. pii: S0091-6749(18)30081-2. doi: 10.1016/j.jaci.2017.12.986. [Epub ahead of print]

Article link:

PhD position - Automatable and high throughput techniques to determine site specificity and quantification of N and O glycan profiles of therapeutic proteins

Oxford, February 2018

Ludger logoThe graduate school Analytics for Biologics (A4B) is offering 15 PhD positions with the aim to produce the much-needed specialists in field of production, down-stream processing and analysis of therapeutic proteins (TP). This Marie Sklodowska-Curie Innovative Training Network (ITN) is composed of 11 European academic and industrial institutions and provides the optimal scientific network for training schools and individual research projects toward a common goal.

One of the A4B PhD positions will be based at Ludger Ltd, funded and based at Ludger Ltd. for three years and supervised by Dr Daniel Spencer, with the PhD registered at the Leiden University Medical Centre with Professor Manfred Wuhrer as a four year course. The PhD position will suit someone with both synthetic chemistry and analytical chemistry experience and will involve the synthesis of a novel fluorophore to be used for automated high throughput glycan and glycopeptide analysis.

For more information and to submit an application, please visit:

Ludger at WCBP 2018

Oxford, February 2018

Ludger Overview of Glycan LabelingDr. Rad Kozak and Dr. Claire Morgan have returned from successful participation at the 2018 CASSS WCBP Symposium in Washington DC.

Their poster presentations on Biopharmaceutical FSH characterisation and Sialylation in Biotherapeutics were well received and they thank everyone for the engaged conversations. They will shortly be sending each of the contacts made at the meeting a copy of the poster.

You can view their posters by visiting our Biopharmaceutical R&D webpage.

Choosing a Glycan LabelLudger Overview of Glycan Labeling

Oxford, January 2018

Our flowchart outlines the choices you can make when selecting a glycan label for your analytical detection method.

To view, visit our Glycan Labelling page which gives an overview of all of the Ludger technology available to you and their applications

Velocity System for Sample Clean Up

Oxford, January 2018

Ludger Velocity System for Sample Clean UpUse of a vacuum manifold for sample clean up speeds up processing times. Ludger’s Velocity vacuum manifold system is compatible with cartridges or plates, and is a valuable tool for your lab.

If you currently use our LC-S cartridges to clean up labelled glycans, you could try our LC-T1 cartridges with the manifold system and process 96 samples in under an hour. We have two plate systems which are compatible with the manifold system; our LC-PBM-96 plate can be used to clean up samples after treatment with endoglycosidase (PNGaseF) or exoglycosidases, and our LC-PROC-96 is designed for glycan clean up after procainamide labelling. The LC-permet-96 clean-up plate is used to enrich N-glycans prior to performing permethylation of released glycans.

We have summarised the options available in a table, which you can view on our Velocity Product page

Using Procainamide for Glycan Labeling

Oxford, December 2017

Ludger Procainamide Comparison TableWe have developed a table that outlines the features and benefits of Ludger's procainamide labeling technology in comparison to competitor offerings.

Procainamide labeling permits glycan identification by either mass spectrometry or (U)HPLC, and because of its improved ionisation efficiency compared to 2AB labeling it can permit identification of minor glycans (<1% relative peak area) by ESI-MS.

Ludger's procainamide labeling system is suitable for N-glycans, O-glycans, GSL-glycans, heparin or any sugar with a reducing terminus and uses the same reductive amination labeling method that has been used for 2AB & 2AA.

For more information, please visit our Procainamide webpage.

Application Note for Quantitative Sialic Acid Analysis

Oxford, November 2017

Ludger Application Note - Sialic Acid AnalysisSialic acid analysis is a regulatory requirement laid out in the ICH Q6B guidelines for characterisation of biopharmaceuticals. We have produced an Application Note detailing how to perform quantitative sialic acid analysis using our technology. This includes the methods for sample preparation using the LudgerTag DMB release and labelling kit and our system suitability standards as well as information for LC analysis using LudgerSep (U)HPLC columns.

To view, please visit our webpage on Sialic Acid Analysis

Ludger appoints Paul Plume as Chief Operating Officer

Oxford, September 2017

Ludger logoLudger Ltd, providing world-leading glycobiology expertise, glycotechnology products and services, is delighted to announce the appointment of Paul Plume as Chief Operating Officer

Paul joins Ludger in early November. His previous role was Program Director at the Getinge Group where he worked on stakeholder Group Projects spanning 6 global manufacturing sites, 3 global design centres and all group functions. Projects covered operational, engineering, regulatory, computer system, quality, branding and product safety. Prior to this Paul was at Abbott for over 12 years moving through a variety of functional areas covering capacity planning, engineering and operations for a variety of technical, operational and sales units within Abbott's Diabetes Care division. He has a Bachelor in Engineering from Leeds and studied on the Advanced course in Design, Manufacture and Management (ACDMM) from University of Cambridge.

Paul will add great value to Ludger as it continues on its journey.

China BioPharma Seminar

Oxford, September 2017

Daryl Fernandes presenting in ShanghaiDaryl Fernandes, Chief Executive of Ludger Ltd gave a seminar to members of the Chinese Biopharmaceutical Industry on September 15th 2017. This event was an excellent opportunity for us to meet drug developers in China and to share our expertise in the field of Glycobiology. The event was held at Shanghai‘s Zhangjiang Hi-tech Park Conference Hall. Daryl’s talk was entitled "GlyShape: a strategic technology programme for streamlining QbD-based development of glycoprotein therapeutics" and attracted much interest.

Lily Wang, Technical Sales Executive, Ludger China said "This seminar was a great success and there were many interesting technical discussions on the day". Cindy Li, Sales Executive, Ludger China commented "We look forward to working closely with our clients in China and helping them to achieve their goals".

Bruker Daltonics co-hosted this event and gave a talk entitled "Bruker Innovative Mass Spectrometry helps you improve the efficiency of protein drug mass spectrometry".

For more information on Ludger's GlyShape programme and how it can be implemented for biosimilar drug development please contact us:

PNGaseF enzyme for more rapid glycan release

Oxford, September 2017

Ludger-NEB partnership

In partnership with New England Biolabs®, (NEB®), we are selling a PNGaseF enzyme kit which is suitable for releasing glycans from as many as 150 samples. The kit (Cat No. LZ-rPNGaseF-kit) contains 75,000 units of recombinant PNGase F at concentration of 500,000 units/ml.

PNGase F is suitable for release of all types (high-mannose, hybrid and complex) N glycans from glycoproteins and glycopeptides under denaturing or non-denaturing conditions. Supplied glycerol free for optimal performance in HPLC and MS intensive methods.

Cat #    LZ-rPNGaseF-kit

For enquiries or more information, please contact:

Horizon 2020 Grant to Study EPO and TNF-AB

Oxford, September 2017

Ludger-Marie CurieLudger is a member of a pan European consortium which has been awarded H2020-MSCAITN-2017 (Marie Skłodowska-Curie Innovative Training Networks) Grant focussing on the qualitative and quantitative analysis and purification of therapeutic proteins. This 4-year project begins in October and a PhD student (ESR) will be based at Ludger for three years.

Our PhD student will focus on the development of automatable and high throughput techniques to determine site specificity and quantification of N and O glycan profiles of EPO and TNF-AB. The project will build upon a recently developed product, VTAG, used to analyze and relatively quantify glycan types on the Fc receptor of monoclonal antibodies without releasing the glycan.

Glycans from the therapeutic proteins will be analysed using UHPLC based hydrophilic interaction chromatography, and a glycopeptide fluorophore label will be optimized for MS and CGE-LIF analysis by chemical modification. Additionally, quantitative glycopeptide standards will be prepared and finally the assay will be automated and validated according to ICHQ2(R1) guidelines.

Characterisation of glycosylation in EPO using acetyl esterase

Oxford, July 2017

A paper entitled "Analysis of three epoetin alpha products by LC and LC-MS indicates differences in glycosylation critical quality attributes, including sialic acid content" has been accepted for publication by Analytical Chemistry. This work was the result of a collaboration between the University of Reading, University of Sheffield and Ludger.

Author(s): Thomson, Rebecca; Gardner, Richard; Strohfeldt, Katja; Fernandes, Daryl ; Stafford, Graham; Spencer, Daniel; Osborn, Helen. Reference: Anal Chem. 2017 Jun 9. doi: 10.1021/acs.analchem.7b00353. [Epub ahead of print] PMID: 28509534

LudgerZyme Acetyl EsteraseAs part of this work, we used acetyl esterase (sialate-O-acetylesterase) to remove 9-, 8- and 7-O-acetyl groups from the EPO biopharmaceutical glycans as these sugars and their acetylation are believed to be essential factors for the function, efficacy and half-life of the drug in patients. This enzyme can also be used for the characterisation of other highly sialylated biotherapeutics such as FSH and blood clotting factors.

Reference: Biochem J. 2015 Dec 1;472(2):157-67. doi: 10.1042/BJ20150388. Epub 2015 Sep 16.

Acetyl esterase (sialate-O-acetylesterase) is available to order from Ludger:

Cat #

LZ-ACASE-KIT     Kit containing enzyme and buffer sufficient for 50 samples

Tools for Analysis of Negatively Charged Glycans

Oxford, May 2017

LudgerSep C bufferNegatively charged glycans (sialic acids, sulphated or phosphorylated sugars) often play a critical role in the function of a glycoprotein. For example sialic acids increase the serum half-life of glycoproteins by protecting them from degradation by the asialoglycoprotein receptor; sulphated glycans are involved in cell adhesion; and Mannose-6-Phosphate is a key targeting signal for transport of glycoproteins to lysosomes and is present in therapeutic enzymes (enzyme replacement therapies) developed for treatment of lysosomal storage diseases.

The LudgerSep-C3 column (Cat # LS-C3-7.5x75) is a weak anionic exchange (WAX) HPLC column that enables you analyse negatively charged sialylated, phosphorylated and sulphated glycans. This technique is also known as ‘charge profiling’. An example of the information that can be provided is the relative amounts of sialylation (1, 2, 3 or 4 sialic acids) on your glycoprotein which is important to know when analysing a highly sialylated protein such as erythropoietin (EPO).

Although sialylated and sulphated glycans can be separated by anion exchange at a low pH of 4.4, the phosphorylated sugars would not be fully charged and there would be multiple species in solution. In order to have one buffer which is suitable for separation of all anionic glycans (sialic acids, phosphorylated and sulphated sugars) Ludger recommends the use of pH9 ammonium formate buffer. The LudgerSep C buffer is a pH 9 ammonium formate buffer concentrate (Cat# LS-C-BUFFX4) which is suitable for separation of all anionic glycans (sialic acids, phosphorylated and sulphated sugars). This concentrate can easily be diluted with water and acetonitrile then used directly as a solvent for the LudgerSep C3 column.

Cat #

LS-C3-7.5x75     LudgerSep-C3 column
LS-C-BUFFX4      LudgerSep C buffer concentrate

For enquiries or more information, please contact

Analysis of Erythropoietin (EPO)

Oxford, March 2017

Ludger EPO AnalysisErythropoietin (EPO) biologics generate substantial revenue for the biopharma industry and as their patents expire the market for EPO biosimilars is set to grow considerably. Analysis of the glycosylation of EPO is a challenging requirement for drug developers because this glycoprotein hormone exhibits significant heterogeneity and its high degree of sialylation and accompanying acetylation can significantly affect its therapeutic properties (particularly the circulation half-life).

At Ludger we have developed accurate and reliable methods for analysis of EPO. In the poster attached here (WCBP 2017) we focus on sialic acid analysis and demonstrate the use of our DMB sialic acid technology (LudgerTag DMB kit, LT-KDMB-A1) to obtain information on the relative levels of the N-acetyl, N-glycolyl and O-acetyl sialic acids. This information can be used in QC to monitor batch-to-batch variation, or for comparability studies.

We can also execute detailed characterisation studies of EPO using LC and MS to give you the information you require.
This includes site specific glycosylation analysis to determine the following:

  • percentage site occupancy for each N-glycan and O-glycan site
  • glycan profile for each glycosylation site, with GU and relative proportions
  • identification of glycans at each glycosylation site (by comparison to structures identified from released glycan analysis)

If you would like more information on the DMB sialic acid technology or our glycoprofiling services (including method transfer) please contact us:

Senior Scientist awarded PhD

Oxford, January 2017

Ludger Leiden Kozak PhD defenseWe are delighted to announce that our Senior Scientist Radoslaw Kozak has successfully defended his PhD thesis at the Leiden University Medical Center, The Netherlands.

Rad has been with Ludger since 2008 and for the past 6 years Ludger has supported his PhD which was undertaken in collaboration with the University of Leiden. His thesis is entitled: 'Rapid and sensitive methods for the analysis and identification of O-glycans from glycoproteins'. This work has led to improvements in Ludger's methods and technology for O-glycan analysis.

We all congratulate our new 'Dr' on his achievement.

Full thesis available online:

Rad (seated centre, with paranymphs Stephanie Holst and Albert Bondt)
Photo by Gerhild Zauner

Innovate UK Grant: MODY diabetes

Oxford, January 2017

Innovate UK LogoLudger is delighted to have been awarded the Biomedical Catalyst 2016 - Feasibility Study grant funding from Innovate UK, for a glycomics precision diagnostic assay for Maturity Onset Diabetes of the Young (MODY).

MODY affects 1-4% of the diabetes patient population and it is estimated that at least 90% MODY patients are misdiagnosed and therefore, often prescribed ineffective treatment. A clinical diagnostics ‘MODY’ assay has been developed to identify patients with the most common form of MODY, HNF1A-type. These patients have reduced plasma outer arm fucosylation which is caused by defects in the HNF1A gene. The MODY assay is a plate based biochemical assay which provides a faster and more affordable alternative to genetic testing.

This exciting project, named GlycanDx-MODY, will be led by Ludger Ltd and includes the following partners; Genos (Croatia) and OCDEM (Oxford University, UK). The goal is to develop a clear business and technology plan for this assay to facilitate its incorporation into a diagnostic pathway for MODY which will ultimately be adopted by healthcare providers at the primary care level.

New publication in Nature Communications on Inflammatory Bowel Disease

Oxford, January 2017

Ludger IBD Nature CommunicationsAn article entitled ‘Integrative epigenome-wide analysis demonstrates that DNA methylation may mediate genetic risk in inflammatory bowel disease’ has been published in Nature Communications. Ludger is a member of the IBD-Biom consortium which contributed to the work.

Citation: Integrative epigenome-wide analysis demonstrates that DNA methylation may mediate genetic risk in inflammatory bowel disease. N. T. Ventham, N. A. Kennedy, A. T. Adams, R. Kalla, S. Heath, K. R. O'Leary, H. Drummond, IBD BIOM consortium, IBD CHARACTER consortium, D. C. Wilson, I. G. Gut, E. R. Nimmo & J. Satsangi. Nature Communications 7, Article number: 13507 (2016); doi:10.1038/ncomms13507.

Article link:

Grant news: GlySign

Oxford, November 2016

Ludger - GlySignWe are delighted to announce that the GlySign project has begun. GlySign is a research training network on glycomic clinical markers and assay development for Precision Medicine. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 722095

We are joined in the GlySign consortium by Genos and Leiden University Medical Center, and will shortly be recruiting two PhD students to be based at Ludger.

For more information please visit:

If you are interested in applying for a PhD position please visit:

Release of O-linked glycans from glycoprotein therapeutics

Oxford, October 2016

Ludger Orela KitLudger offers two Ludger Liberate kits that can be used to release of O-glycans from glycoprotein therapeutics; the Hydrazinolysis kit, LL-HYDRAZ-A2 and the Orela kit, LL-Orela-A2. Whilst hydrazinolysis is the gold standard method to remove all O-links, the Orela Kit contains reagents which are safer and much easier to handle.

O-glycans released using either of these kits have free reducing termini so are compatible with reducing-end labeling using reagents such as 2-aminobenzamide (2AB), 2-aminobenzoic acid (2AA) and Procainamide (Proc) allowing high-performance liquid chromatography (UHPLC) with fluorescent detection.

The Orela kit (Cat # LL-Orela-A2) can be used for up to 12 samples. Each kit includes LC-CEX cation exchange cartridges for O-glycan purification prior to fluorescent labeling.

The hydrazinolysis kit (Cat# LL-HYDRAZ-A2) can be used for up to 12 samples. The release conditions can be optimized for release of N-glycans, O-glycans or both N- and O-glycans. Each kit includes LC-CEX cation exchange cartridges for O-glycan purification and also LC-EB20 cartridges for N-glycan purification.

Ludger Liberate glycan release kits can be incorporated into a workflow for O glycan analysis in your labs:

n.b. exoglycosidase sequencing can be used to gain more detailed information on the O-glycan structures

New publication in Analytical Chemistry on High Throughput Permethylation

Oxford, August 2016

Ludger Permethylation Analytical ChemistryLudger has published an article in Analytical Chemistry presenting an automated and high throughput (HT) glycan sample preparation and permethylation method used for characterisation and relative quantitation of glycans, glycoprotein standards and biopharmaceutical samples (IgG4 and rhEPO). To our knowledge, this is the first largely automated workflow for permethylation that has been executed using a liquid handling robot and a commercially available kit. The matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) profiles obtained showed good agreement with hydrophilic liquid interaction chromatography (HILIC) and ultrahigh performance liquid chromatography (UHPLC) data (which is referred to as the gold standard method for glycan analysis). Automated permethylation and extraction of 96 glycan samples was achieved in less than 5 h and automated data acquisition on MALDI-TOF-MS took on average less than 1 min per sample, making this method convenient, fast, and reliable.

Citation: Automated High-Throughput Permethylation for Glycosylation Analysis of Biologics Using MALDI-TOF-MS. Archana Shubhakar, Radoslaw P. Kozak, Karli R. Reiding, Louise Royle, Daniel I. R. Spencer, Daryl L. Fernandes, and Manfred Wuhrer. Analytical Chemistry Article ASAP; DOI: 10.1021/acs.analchem.6b01639.

Pubmed link:

Hydrophilic interaction amide clean up cartridges

Oxford, July 2016

Ludger Scientific ReportsLudger's LudgerClean A cartridges are hydrophilic interaction amide cartridges (Cat # LC-A-24) which can be used for a number of applications, including clean up of:

  • 2AA/or 2AB labelled N glycans
  • VTag labelled glycopeptides
  • APTS labelled N-glycans

Each pack of LC-As contains 24 cartridges.
To order or request a quotation, contact

Study of Immunoglobulin A glycosylation in pregnancy: results published in Nature Scientific Reports

Oxford, June 2016

Ludger Scientific ReportsLudger has worked in collaboration with the Department of Rheumatology, Erasmus University Medical Center, Rotterdam, The Netherlands and Leiden University Medical Centre, The Netherlands to study IgA glycosylation in pregnancy.
Serum samples were taken at different stages of pregnancy and after delivery from a cohort of 29 women. A high-throughput workflow was adopted for the simultaneous analysis of serum-derived IgA1 N- and O-glycopeptides using matrix-assisted laser/desorption ionisation Fourier transform ion cyclotron resonance (MALDI-FTICR) mass spectrometry (MS).
Pregnancy associated changes of N-glycan bisection were found to be different for IgA1 compared to IgG-Fc. This method could be used for larger patient cohorts to study IgA N- and O-glycosylation changes in pathologies.

Citation: Bondt, A. et al. Longitudinal monitoring of immunoglobulin A glycosylation during pregnancy by simultaneous MALDI-FTICR-MS analysis of N- and O-glycopeptides. Sci. Rep. 6, 27955;doi: 10.1038/srep27955 (2016).

Link to full-text publication

New Publication: Site-specific N-glycosylation analysis of HIV-1 Envelope Glycoprotein

Oxford, March 2016

Ludger Ceramide Glycanase EnzymeThe trimeric HIV type 1 (HIV-1) envelope glycoprotein (Env) is targeted by broadly neutralizing antibodies (bNAbs) produced by the immune system during infection. As part of our collaboration with Max Crispin and his group at the University of Oxford, UK, we have performed site-specific N-glycosylation analysis of the gp120 and three gp41 subunits of Env. Using MALDI-MS, LC-MS and HILIC-UPLC our results uncovered a dominance of oligomannose-type glycans and revealed a mosaic of glycan microclusters bearing under-processed glycans, especially in areas covering the gp120 outer domain and at the trimer interfaces. This information will assist in the design of Env-based vaccine immunogens.

The work has now been published in Cell Reports:

Link to full-text publication

R&D at Ludger

Oxford, February 2016

Ludger Ceramide Glycanase EnzymeLudger has an ongoing Research and Development programme dedicated to improving glycan analysis for biopharmaceuticals and medical glycomics. Around half of our R&D is funded by EU grants as part of collaborative research programmes.

To find out more about these exciting projects please visit our R&D page

Here you will also find a full list of recent scientific posters as well as articles and publications and talks and presentations

LudgerZyme™ Ceramide Glycanase Enzyme

Oxford, February 2016

Ludger Ceramide Glycanase EnzymeGlycosphingolipids (GSLs) are implicated in the pathogenesis of various diseases including Fabry disease, Gaucher disease , Tay-Sachs disease and Sandhoff disease . The enzyme ceramide glycanase can be used for the characterisation of GSLs as it deglycosylates a variety of GSLs by cleaving the β-glycosyl linkage. Once free, the GSL glycans can be fluorescently labelled using LudgerTag labelling technology and then analysed to identify their glycosylation patterns.

Ludger’s ceramide glycanase kit (LZ-CER-HM-KIT) contains purified ceramide glycanase enzyme, buffer and and GM1 glycolipid. The kit is sufficient to deglycosylate 25 samples.

Cat # LZ-CER-HM-KIT     LudgerZyme™ Ceramide Glycanase Enzyme

To request a quote please contact

Permethylation of glycans

Oxford, February 2016

ludger permethylation kitPermethylation is the most popular technique for the derivatisation of carbohydrates for MALDI-MS detection, as it enhances ionization efficiency, stabilizes the sialic acids and aids linkage analysis studies. On average one sample can take as little as 1 minute for data acquisition using MALDI-MS, making it appealing for Quality by Design (QbD) and biomarker studies. Since the conventional in-solution technique to permethylate glycans is labour intensive with long turnaround times, we have developed a microplate-based permethylation kit to give you a cost effective, high throughput and reliable method.

Our new LudgerTag kit, LT-PERMET-96, can be used to process 1-96 samples using either a manual method or an automated method that has been adapted to a liquid handling robot. LT-PERMET-96 gives excellent signal enhancement due to increased ionization efficiency and the technology has been validated according to ICH Q2 (R1) guidelines (for Analytical Validation). Intra assay repeatability CVs for relative % intensities were ≤12% for major N-glycans from human IgG with a relative % areas of ≥ 5%.The results from validation studies suggest that this permethylation technique gives data that is comparable to UHPLC from 2-AB labelled and procainamide labelled glycans.

We also sell a Pre-Permethylation Clean-up Plate (Cat# LC-PERMET-96) for enrichment of released N-glycans before the permethylation step, as well as the following permethylated human IgG glycan standards, which can be used as system suitability standards and/or as calibration standards for MALDI-TOF-MS analysis:

For more information or pricing on any of these products please contact
Click here to view a poster presentation on the subject, and you can also view a full list of Ludger's recent scientific posters.

Summary of Glycan Cleanup Techniques

Oxford, November 2015

We offer a range of LudgerClean products to suit your specific need. The table below summarises the different applications.

ludger glycan cleanup table
click to enlarge

For additional technical advice, contact
Orders can be sent to

Purified Glycan Standards

Oxford, September 2015

Ludger produces a comprehensive range of purified glycans, including IgG glycans, which are used as standards during the analysis of biopharmaceuticals.

Purity acceptance criteria is 85% as determined by HILIC chromatography of the 2AB labeled glycans. HPAE-PAD chromatography, MALDI mass spectrometry and NMR analysis are also performed as supporting data.

In the examples here we have given their short names and Ludger product names:

Short Name
Oxford Notation Ludger Product
G0 A2 NGA2
G1 A2G1 A2G1
G2 A2G2 NA2

For the full list of these and other glycans (unlabeled, permethylated or labeled with 2AB, 2AA, procainamide or APTS), please visit

If you are unsure if we have the standard you are looking for, please contact us at

HIV-1 Publication in Nature Communications

Oxford, July 2015

We are delighted to announce that our collaboration with Dr Max Crispin and colleagues at the Oxford Glycobiology Institute, University of Oxford, UK, has resulted in a publication in Nature Communications. The paper is entitled "Glycan clustering stabilizes the mannose patch of HIV-1 and preserves vulnerability to broadly neutralizing antibodies".

The HIV-1 envelope glycoprotein gp120 is essential for virus entry into cells as it attaches to specific cell surface receptors. Whilst glycans on gp120 can protect the virus from antibody-mediated neutralization, a 'mannose patch' of under-processed oligomannose-type structures can also be a target for potent broadly neutralizing antibodies (bnAbs). Glycosylation site analysis on gp120 was performed using methods developed at Ludger. The contribution of individual glycosylation sites in the formation of the mannose patch is discussed in this publication, and supports the use of the mannose patch as a target for vaccine design.

Contact us for more information on Ludger's glycosylation site analysis service,

Ludger V-TAG Glycopeptide Labeling and Enrichment Kit

Oxford, March 2015

We are pleased to announce the launch of a kit for the labeling and enrichment of IgG glycopeptides, enabling analysis by (U)HPLC or MALDI Mass Spectrometry.

The VTAG kit (Cat # LT-VTAG-24) is suitable for IgG subclass glycoproteins that have been digested with pronase or trypsin to release the glycopeptides. As little as 5ug IgG sample can be used. The VTAG kit labels each sample in 1 hour and enriches the sample using a solid phase extraction (SPE) device for a further hour.

This kit has been validated according to ICH guideline Q2 (R1) guidelines. Using different IgG samples and replicates of 9 for each, CVs for repeatability were typically <5%.

Cat #

LT-VTAG-24     LudgerTag™ V-Tag Glycopeptide Labeling and Enrichment Kit

To request a quote please contact

Ludger Procainamide Labeling Kit

Oxford, February 2015

Procainamide labeling permits glycan identification by either mass spectrometry or UHPLC, and because of its improved ionisation efficiency compared to 2AB labeling it can permit identification of minor glycans (>1% relative peak area) by ESI-MS.

We are delighted to announce the launch of a Ludger kit for labeling glycans with procainamide (using 2PB as a reductant in place of sodium cyanoborohydride), along with a post-labeling clean up plate for the samples. This technology has been validated in house at Ludger; typical CVs for triplicate analyses were <5%.

Cat #

LT-KPROC-VP24     LudgerTag™ PROC (procainamide) Glycan Labeling Kit containing 2-picoline borane

To request a quote please contact

Does Long Term Storage Affect Glycosylation of Biotherapeutics?

Oxford, October 2013

Ludger has been working in collaboration with Arecor Ltd to study the effect of storage conditions on the glycosylation of biotherapeutics. Following long term storage at elevated temperatures in Arecor’s formulation technology Arestat™, the N-glycosylation profiles of EPO and IgG were obtained. Results showed that Arecor’s technology maintains glycosylation profiles of EPO or IgG after prolonged storage at elevated temperature.

If you would like more information about this or would like to discuss how we can help you to monitor your biopharmaceutical’s glycosylation, please contact

Permethylated IgG glycan standards for MS analysis

Oxford, October 2013

Structural analysis of carbohydrates is a requirement for biopharmaceutical characterisation and may include the determination of the following features: molecular mass, composition of monosaccharides and their configurational and conformational isomers, sequence of monosaccharide residues, presence and position of branches and functional groups and interglycosidic linkages.

Mass spectrometry is a useful tool in determining the molecular weights but the sensitivity can be low especially where there are many different structures. Carbohydrates often contain carboxy, amino, sulphate, and phosphate groups and both the nature and the position of these groups on the residue and the position of this residue within the glycan may be difficult to determine. Permethylation of glycans converts hydrogen groups to methyl groups which renders the glycans hydrophobic; the conversion stabilises sialic acids and can increase signal intensity in mass measurements.

Ludger now offers a permethylated IgG glycan library to use as a system suitability standard during MS analysis. Ludger also offers a C13 version of the standard which can be used as an internal standard in the same MALDI chip spot as your C12 labelled permethylated glycans.

Cat #

CPM-C13-IGG-01     N-glycan IgG library, permethylated with heavy (13C) MeI
CPM-IGG-01   N-glycan IgG library, permethylated

To request a quote or place an order please contact

LudgerSep™ C Buffer x4 concentrate for HPLC separation of sialylated, phosphorylated and sulphated glycans.

Oxford, September 2013

Many glycoproteins contain sialylated, sulphated or phosphorylated sugars, including drugs containing Mannose-6-Phosphate (Man6P). Man6P is a key targeting signal for acid hydrolase precursor proteins that are destined for transport to lysosomes and is present in therapeutic enzymes (enzyme replacement therapies) developed for treatment of lysosomal storage diseases.

Ludger has produced an ammonium formate buffer concentrate with a pH of 9 (above the pKa for phosphated glycans), which allows good separation of all anionic glycans (sialic acids, phosphorylated and sulphated sugars) using an anion exchange column.

This concentrate (Cat# LS-C-BUFFX4) simplifies the preparation of solvent for anion exchange, whilst avoiding the variations in buffer pH between batches which could lead to out-of-specification problems during glycan analysis. Simply dilute with water, add acetonitrile and use directly as an HPLC elution gradient when performing glycan analysis using the LudgerSep C3 column, Cat # LS-C3-7.5x75.

To request a quote or place an order please contact

LudgerTag™ 2AB and 2AA Glycan Labelling within 2 hours

Oxford, March 2013

Ludger is delighted to announce that using the LudgerTag™ VP24 kits, glycans can be labelled with 2-aminobenzamide (2-AB) or 2-aminobenzoic acid (2-AA) within 2 hours. These kits incorporate 2-picoline borane (2-PB) reductant, a safer alternative than standard sodium cyanoborohydride. This technology has now been patented and exclusively licenced to Ludger Ltd.

The kits have been validated following ICH Q2(R1) guidelines and beta-tested in the field. Precision values were excellent, with CVs of <5% for peaks with relative areas over 5% and CVs of <8% for peak with relative areas less than 5%. The kits offer equivalent labelling efficiency as standard LudgerTag™ 2AA and 2AB labelling kits containing sodium cyanoborohydride.

Ordering information:

LudgerTag™ 2-AB labelling kit with 2PB Cat# LT-KAB-VP24

LudgerTag™ 2-AA labelling kit with 2PB Cat# LT-KAA-VP24

To request a quote or place an order please contact

LudgerTag™ 2AB and 2AA Glycan Labelling Kits with Non Toxic Reductant

Oxford, November 2012

Fluorescent labelling methods for glycoprofiling of therapeutic glycoproteins are well established and aid subsequent separation and quantitation using a range of techniques. These include high performance liquid chromatography (HPLC and UHPLC), capillary electrophoresis (CE), and mass spectrometry. Of the fluorescent labels available, 2-aminobenzamide (2-AB) and 2-aminobenzoic acid (2-AA) are most widely used for oligosaccharide profiling. Existing 2-AA and 2-AB labelling kits use sodium cyanoborohydride as a reducing agent during glycan labelling. This reagent is toxic so a fume cupboard should be used during handling.

Following on from research performed by Ludger Ltd. in collaboration with Leiden University Medical Centre, The Netherlands, we have developed labelling kits containing a different and non-toxic reducing agent, 2-picoline borane (2-PB). This technology has now been patented and Ludger is delighted to offer two new kits for labelling glycans with either 2-AB (Cat# LT-KAB-VP24) or 2-AA (Cat# LT-KAA-VP24).

The kits have been validated following ICH Q2(R1) guidelines and beta-tested in the field. Precision values were excellent, with CVs of <5% for peaks with relative areas over 5% and CVs of <8% for peak with relative areas less than 5% (see Figure 1). The kits offer equivalent labelling efficiency as standard LudgerTag™ 2AA and 2AB labelling kits containing sodium cyanoborohydride (Figure 2).

Each kit comprises two premixed bottles; one containing acetic acid and DMSO solution and the other containing 2-AB or 2-AA label combined with 2PB. This makes the labelling process simpler. Labelling can also be performed within 2 hours.

Ordering information:

LudgerTag™ 2-AB labelling kit with 2PB Cat# LT-KAB-VP24

LudgerTag™ 2-AA labelling kit with 2PB Cat# LT-KAA-VP24

To request a quote or place an order please contact

Quantitative Glycopeptide Standard for Accurate Monosaccharide or Sialic Acid Quantitation

Oxford, November 2012

Quantitative sialic acid or monosaccharide analysis is an important step for developers and manufacturers of biologic drugs. Regulators are putting increasing pressure on companies to perform accurate glycoprofiling on their biopharmaceuticals. These analyses fall within ICH guidelines Q6B and Q5Efor comparability studies during product development and after major manufacturing changes. Furthermore, the recent EMA monograph on monoclonal antibodies and forthcoming USP chapters <1084> and <1094>on glycosylation analysis reinforce the need to perform glycoprofiling throughout the drug life cycle. Until now the difficulty with accurately quantifying sialic acids or monosaccharides has been the lack of quantitative standards.

Ludger Ltd. has produced a purified glycopeptide standard, the first in a range of Ludger BioQuant™ quantitative standards, which can be used as an internal standard and positive control when performing sialic acid or monosaccharide analyses in house. This particular Ludger BioQuant™ Standard (Cat# BQ-GPEP-A2G2S2-10U) is a complex biantennary N-linked glycan terminating in two N-acetylneuraminic acids.

Purity of >90% has been assessed by HPLC, correct mass identity assessed by MALDI mass spectrometry. The exact amount of material has been determined by quantitative NMR (qNMR) and quantitative monosaccharide analysis (MA). Quantity values by qNMR and MA agree within 90-110%.  MA is traceable to internationally accepted references from USP and dispensed using NIST traceable labware. qNMR is traceable to a NIST SRM traceable CRM analysed to the ISO 17025 standard. A detailed certificate of analysis is given for each standard. This contains comprehensive documentation, lot-specific values, expiration date and storage information.

The BioQuant GPEP-A2G2S2 standard can be used during the sialic acid or monosaccharide release and labeling process. This will enable you to check the efficiency of glycan release, labeling and recovery and will give you confidence in the accuracy of your sialic acid or monosaccharide measurements.

To request a quote or place an order please contact

Protein O-Glycosylation Analysis Review

Oxford, August 2012

Following the collaboration of Ludger with the University of Leiden, we are delighted to announce a publication in the journal Biological Chemistry.

This informative review describes the current methods available for analysis of O-glycosylation and discusses challenges that need to be met in the future. Areas covered include: analysis of released O-glycans, analysis of formerly O-glycosylated peptides (in order to give information on O-glycan attachment sites), and analysis of O-glycopeptides. Particular emphasis is given to MS fragmentation techniques such as collision-induced fragmentation, electron capture dissociation, and electron transfer dissociation.


Gerhild Zauner, Radoslaw P. Kozak, Richard A. Gardner, Daryl L. Fernandes, André M. Deelder and Manfred Wuhrer. Biol. Chem., Vol. 393, pp. 687–708, August 2012