Meeting your needs for robust charge variant profiling

Biotherapeutic proteins such as monoclonal antibodies (mAbs) are far more heterogeneous than small-molecule drugs. The presence of the charged state can significantly impact the structure, stability, binding affinity, and efficacy of the biotherapeutic drug. It is therefore necessary to understand the profile of the drug so that charge variants are identified and removed if necessary.

The heterogeneity of monoclonal antibodies is revealed by charge sensitive methods; such as ion exchange chromatogram (IEX). We offer a range of buffers, ion exchange or hydrophobic interaction column chemistries, and UHPLC instrumentation to meet the needs for robust analysis of charge variants in monoclonal antibodies and therapeutic proteins.

Popular charge heterogeneity analysis products

Charge variant profiling workflow


Charge variant analysis categories

Achieve robust and reproducible gradients using Thermo Scientific pH Gradient Buffer platform. They are applicable to a wide range of mAbs and ready to use with existing LC columns and systems—including the Thermo Scientific™ Vanquish™ Flex UHPLC system—without the need to formulate mobile phases. The pH gradient platform saves time in method development and facilitates method transfer to QA/QC for a wide range of mAb charge variants through a generic LC-based approach to mAb characterization.

Columns for separating protein charge variants

The gold standard column for charge variant profiling of monoclonal antibodies is widely regarded  as the Thermo Scientific™ ProPac™ WCX-10. ProPac columns resolve isoforms that differ by a single charged residue. A thin, hydrophilic layer grafted to the particle core eliminates unwanted secondary interactions. The cation-exchange surface provides pH-based selectivity control and fast mass transfer for high-efficiency separation and moderate capacity.

We developed our next generation cation exchange column to extend column lifetime and method robustness - the Thermo Scientific™ MAbPac™ SCX-10 LC Column is for high-resolution, high efficiency analysis of monoclonal antibodies (mAbs) and associated variants. The unique nonporous pellicular resin provides the resolving power to separate mAb variants. A hydrophilic layer surrounds polymeric beads and eliminates hydrophobic interactions with the resin, resulting in very efficient peaks. A proprietary grafted cation-exchange surface provides pH selectivity control for high-resolution separations.

  View the video: Monoclonal Antibody Analysis Update: Better Separations of MAb variants
Chromatography system built for robust routine protein characterization

Obtain new benchmarks in accuracy, precision, and sensitivity in a biocompatible UHPLC system with state-of-the-art quaternary solvent blending. The Thermo Scientific Vanquish Flex Quaternary UHPLC system shares all the values inherent to the Vanquish product line, including an innovative design, focus on uptime, robustness, and reliability. Multiple detection options as well as Thermo Scientific™ Viper™ Fingertight Fitting connections throughout the system give you the performance you need with the ease of use you want. The combination makes this system ideal for biopharmaceutical and pharmaceutical applications.

   View the video: Vanquish Flex UHPLC - The Evolution of a Biocompatible Masterpiece
Chromatography data solution for GMP testing of protein charge variants

Streamline your laboratory workflow using Thermo Scientific Chromeleon 7.2 Chromatography Data System (CDS) software. This software delivers superior instrument control, automation, and data processing for compliant GxP biopharmaceutical manufacturing and QA/QC environments.

Run your routine HPLC, UHPLC, or LC-MS protein charge variant analyses in an enterprise environment—from method creation to final reporting.