Protein & Antibody Characterization

Analytical Protein & Antibody Characterization

As major components of humoral immunity, IgG antibodies and other therapeutic proteins have been at the centre of biologic drug development for decades. These molecules are highly specific and structurally complex, so protein and antibody characterization require coordinated, multi-dimensional analytical workflows rather than a single assay.

At Biofidus, detailed analysis and characterization of therapeutic proteins and antibodies is part of our daily routine. Our portfolio spans in-depth primary structure analysis and sequence confirmation, amino acid and post-translational modifications (PTMs), glycosylation profiling, and binding and functionality testing in cell-based assays. We are specialists in antibody glycosylation analysis, one of the most critical protein modifications influencing function, stability and immunogenicity of biopharmaceuticals. Using advanced LC-MS/MS, chromatographic, electrophoretic and bioassay platforms, we design fit-for-purpose protein characterization packages for monoclonal antibodies, bispecific antibodies, fusion proteins and other biologics.

Our extensive experience allows us to guide you through the variety of available methods and define the optimal analytical strategy for your project.

We adapt our platform methods to the properties of your drug substance, its individual formulation matrix, and your specific analytical question, and qualify them as needed according to ICH guidelines.

Get in contact with us to quickly find the optimal setup for your analytical challenge and to speak directly from expert to expert.

Our Capabilities

  • Primary structure and sequence integrity
  • Post-translational modifications (PTMs) and amino acid variants
  • Disulfid linkage
  • Glycosylation profile and site-specific glycoforms
  • Higher-order structure and conformational integrity
  • Size variants, aggregation and particles
  • Charge variants and isoforms
  • Impurities and product-related variants (HCP / residual DNA)
  • Target binding, affinity and kinetics
  • Biological potency and mechanism-of-action–relevant activity
  • Stability and degradation behavior under stress
  • Setup, transfer and qualification of analytical methods​

Just what you need? Contact us!

Standalone and integral bioanalytical services

TECHNOLOGIES USED

  1. LC-ESI-MS/MS peptide mapping
  2. LC-ESI-MS intact mass analysis
  3. Reversed phase (RP) chromatography
  4. Size exclusion chromatography (SEC)
  5. Hydrophilic interaction chromatography (HILIC)
  6. Hydrophobic interaction chromatography (HIC)
  7. Ion exchange chromatography (IEX)
  8. High performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD)
  9. Absolute protein quantification (AQUA)
  10. Capillary gel electrophoresis (CGE)
  11. Capillary isoelectric focusing (cIEF)
  12. Capillary zone electrophoresis (CZE)-UV
  13. (2D-)SDS-PAGE
  14. Gel based isoelectric focusing (IEF)
  15. Western blot
  16. ELISA
  17. Surface plasmon resonance (SPR)
  18. Cell-based assays
  19. Plasma/serum stability assays
  20. Nanopore DNA/RNA sequencing
  21. qPCR
  22. Analytical ultracentrifugation (AUC)
  23. Circular dichroism (CD)
  24. Differential scanning calorimetry (DSC)
  25. Dynamic light scattering (DLS)
  26. Fourier transform infrared (FTIR) spectroscopy

Tell us about Your Project

We‘ll advise you to define your assay needs.

By sending the contact form you agree to our privacy policy.
*By submitting this form, you are consenting to receive emails from: Biofidus AG. You can revoke your consent at any time by using the unsubscribe link, found at the bottom of every email. Please see our privacy policy.

Our Expert

Our CEO Dr. Benjamin Müller advises you on all your requests concerning the general topic of protein characterization.
GDPR Cookie Consent with Real Cookie Banner