Protein Agarose consists of the recombinant protein produced in E.coli.

Following purification, it is covalently immobilized onto 4% cross-linked agarose beads. The protein has been designed to eliminate the albumin and cell surface binding domains to reduce nonspecific bindings. Hence it can be used to separate albumin from crude human IgG samples. Protein Agarose is suspended in 20% ethanol/PBS.