With new advances in expression vectors, the bioprocessing industry has seen a significant increase in antibody expression levels. To meet the demands of these increased titers, protein A chromatography columns need to be further scaled up in size and/or run in multiple cycles — with a consequent increase in buffer consumption, preparation, and storage. One way to address this problem is to develop other capture steps with high-capacity resins that can replace the protein A step.

This article outlines the methods and materials used to develop a high-capacity capture step using cation-exchange (CEX) chromatography to replace the existing protein A chromatography – making it possible to use existing chromatography hardware and eliminate increases in the buffer volume and holding tank size at existing manufacturing plants. Download the full article as a PDF below.