Tosoh Bioscience, a provider of chromatographic solutions for the isolation and analysis of biomolecules, introduced a new Protein A chromatography resin designed for the purification of monoclonal antibodies (mAbs). It is well-suited for high capacity capturing of immunoglobulin out of high titer feedstock. TOYOPEARL AF-r Protein A HC-650F achieves 30% to 50% greater antibody adsorption than similar products. It exhibits dynamic binding capacities of greater than 70 g/L at residence times of five minutes and greater than 50g/L at residence times of two minutes with feedstock titers from 1g/L to more than 10g/L.

The recombinant ligand that is linked to the well proven methacrylic polymer backbone of TOYOPEARL media has been engineered to maintain capacity even after repeated exposure to alkaline solution. Its multipoint attachment to the TOYOPEARL matrix further enhances chemical and thermal stability. In practice this pays off for a low level of Protein A leaching and also for a high resistance to alkaline solutions applied in cleaning-in-place (CIP) procedures. Due to its rigid polymer matrix TOYOPEARL AF-rProtein A HC-650F also provides excellent pressure flow characteristics.

Protein A resins constitute a substantial cost in state-of-the-art mAb purification processes. Factors such as operating cycles, capacity, and mAb titer can have an impact on total costs associated with mAb purification. The high capacity of the new TOYOPEARL AF-rProtein A HC-650F resin and its high alkaline resistance increase product throughput, reduce operating costs and increase manufacturing productivity.