Antibody Drug Conjugates (ADCs)


Antibody-Drug Conjugate Analysis

Antibody-drug conjugates are among the most dynamic targeted cancer therapies, designed to deliver highly potent cytotoxic payloads specifically to tumor cells while limiting effects on healthy tissue. This requires a precise understanding of antibody structure, payload conjugation, target-binding properties as well as plasma stability.

At Biofidus, we offer end-to-end antibody-drug conjugate (ADC) analysis and characterization services covering both structural and functional characterization to build a robust, regulator-ready data package for your ADC project.

Our analytical portfolio includes in-depth protein primary structure analysis, post-translational modification profiling, determination of drug-to-antibody ratio (DAR) and DAR distribution, assessment of conjugation sites, level of aggregation and free payload, as well as stability and forced-degradation studies to evaluate linker and payload stability under relevant conditions.

Functionally, we characterize your lead ADC molecules using customized cell-based potency assays, target-binding and kinetics by surface plasmon resonance (SPR) or related technologies, and, where needed, assays that probe internalization and mechanism of action.

Our vast experience and deep knowledge in ADC analytics allow us to guide you through the variety of available methods and to define the optimal analytical strategy for your antibody-drug conjugate.

In accordance with your needs, we adapt and, if required, qualify our platform methods according to ICH guidelines, tailoring them to your drug substance (DS), its formulation matrix and your specific analytical questions.

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

Our Capabilities

  • DAR determination
  • Site-specific conjugation analysis
  • Disulfide linkage analysis
  • Purity
  • Fab and Fc binding
  • Functionality assessment
  • Internalization assay
  • Stability testing and forced degradation

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. Quantitative PCR (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.

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Our Expert

Across end-to-end delivery, our experts remain on hand with deep scientific expertise whenever needed, providing oversight to streamline and de-risk milestone delivery.

FAQ

Find quick answers about our antibody analytics, from LC‑MS/MS peptide mapping and glycosylation to charge/size variants, SPR binding kinetics, comparability, and stability/forced degradation.

We run coordinated, multi-dimensional antibody characterization workflows rather than a single assay — covering size variants/aggregation (e.g., SEC), charge variants (cIEF/CZE and chromatographic methods), and mass spectrometry-based characterization such as intact mass and LC‑ESI‑MS/MS peptide mapping.

Yes. We offer LC‑ESI‑MS/MS peptide mapping for sequence confirmation and in-depth primary structure analysis, including PTM characterization as part of fit-for-purpose antibody packages.
Yes. Our antibody characterization portfolio includes primary structure and sequence integrity analysis, typically supported by LC‑MS peptide mapping and complementary analytical methods.

Yes. We profile PTMs and amino-acid modifications/variants as part of antibody and protein characterization, using MS-based workflows and orthogonal analytical platforms where appropriate.

Yes. We support site-specific N‑glycosylation and glycopeptide workflows (LC‑ESI‑MS) to link glycoforms to relevant CQAs and comparability questions.
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