---
type: "WebPage"
title: "Disulfide bridge analysis laboratory"
description: "As a biopharmaceutical manufacturer, you would like to carry out an analysis of disulfide bridges What is a disulfide bridge? A disulfide bridge is a covalent bond formed between two sulfur atoms belonging to cysteine residues within a protein or..."
resource: "https://filab.fr/en/sectors-of-activity/biopharmaceutical/disulfide-bridge-analysis/"
tags: ["EN", "pll_67a5c5af9eca1", "Anaïs DECAUX"]
timestamp: "2026-03-04T09:17:45Z"
published: "2025-02-07T08:57:39Z"
language: "en"
author: "Laure Durieux"
---

# Disulfide bridge analysis laboratory

## As a biopharmaceutical manufacturer, you would like to carry out an analysis of disulfide bridges

### What is a disulfide bridge?

A **disulfide bridge** is a covalent bond formed between two sulfur atoms belonging to cysteine residues within a protein or peptide. These bonds are essential to the three-dimensional stability of biomolecules, influencing their structure, biological activity and resistance to environmental conditions. Alterations to disulphide bridges can compromise the efficacy and safety of a product, particularly in the [biopharmaceutical](https://filab.fr/en/sectors-of-activity/biopharmaceutical.md) and biotechnology sectors.

### Why analyse the disulfide bridges?

Disulphide bridges play a key role in the stability and function of [proteins](https://filab.fr/en/sectors-of-activity/biopharmaceutical/biotherapeutic-recombinant-protein-characterization/protein-analysis.md) and [peptides](https://filab.fr/en/sectors-of-activity/biopharmaceutical/biotherapeutic-recombinant-protein-characterization/peptide-analysis-biopharmaceutical-services.md). Their analysis is essential for :

  Check the structure and conformation of biomolecules Ensuring protein stability under real-life conditions Preventing aggregation and degradation Meeting the regulatory requirements of the pharmaceutical industry
## FILAB supports biopharmaceutical companies in the analysis of disulphide bridges

### Why choose FILAB for disulfide bridge analysis?

FILAB, a laboratory of analytical expertise, offers comprehensive services for disulphide bridge analysis. We offer a range of customised methods to assess the properties of proteins and peptides, tailored to the specific needs of each customer.

### Our disulfide bridge analysis services

Mapping disulfide bridges in [recombinant proteins](https://filab.fr/en/sectors-of-activity/biopharmaceutical/biotherapeutic-recombinant-protein-characterization.md)

Study of the stability of disulphide bridges under oxidative stress

Verification of the stability of disulfide bridges in a peptide

Localization and analysis of free sulfhydryl groups by [HRMS](https://filab.fr/en/our-technical-resources/high-resolution-mass-spectrometry-hrms-analysis.md)

Quantification of disulfide bridges in [monoclonal antibodies (mAbs)](https://filab.fr/en/sectors-of-activity/biopharmaceutical/biotherapeutic-recombinant-protein-characterization/analysis-characterization-monoclonal-antibodies-mabs.md)

Detection of anomalies in the formation of disulfide bridges

Comparative study of formulations to guarantee the integrity of disulfide bridges

## Our technical resources

 [### LC-MS/MS](https://filab.fr/en/our-technical-resources/laboratory-analysis-uplc/laboratory-analysis-hplc-lcms.md) [### HPLC-UV](https://filab.fr/en/our-technical-resources/laboratory-analysis-uplc/hplc-uv-analysis-laboratory.md) [### FTIR](https://filab.fr/en/our-technical-resources/laboratory-analysis-ftir-spectroscopy.md) [### RAMAN Spectroscopy](https://filab.fr/en/our-technical-resources/laboratory-analysis-raman-spectroscopy.md)  ![protéines-enzyme-anticoprs](https://filab.fr/wp-content/uploads/2024/08/shutterstock_2494255323-proteines-enzyme-anticoprs.jpg)
## Our FAQ

 What is disulfide bridge analysis?
Disulfide bridge analysis consists of identifying the covalent bridge between two cysteine residues within a protein. This characterization is essential because these bridges stabilize the protein's three-dimensional structure (conformation), thereby determining its biological activity and stability.

 Why is disulfide bridge mapping important for biopharmaceuticals?
The correct formation of disulfide bridge ensures that the recombinant protein possesses the proper tertiary structure. Misfolding or incorrect pairings can:

- Alter the product's therapeutic efficacy.
- Lead to drug instability.
- Increase the risk of immunogenicity (adverse patient reactions).

 Is disulfide bridge analysis a regulatory requirement?
Yes. According to **ICH Q6B** guidelines, the complete characterization of proteins includes determining the primary structure, which includes evidencing disulfide bonds. This is a mandatory step for the validation of registration dossiers for biopharmaceutical products (MA/Marketing Authorization).

 What types of molecules can FILAB analyze?
The FILAB laboratory works with a wide range of complex biological molecules:

- Monoclonal Antibodies (mAbs).
- Recombinant proteins and glycoproteins.
- Synthetic peptides and hormones.
- Antibody-Drug Conjugates (ADCs).