Abstract
Separation of viruses and other contaminants from protein therapeutics using anion exchange membrane adsorbers is a successful new approach to viral clearance; however, the fundamental phenomena that control performance are not well understood. For example, the kinetics of adsorption to the anion exchange surface may limit clearance, but has yet to be characterized experimentally and mathematically. In the present study, surface plasmon resonance was used to determine the adsorption kinetics for five large biological molecules: phage PP7, phage ΦX174, phage PR772, thyroglobulin, and DNA. Rate constants were incorporated into a kinetic model of chromatography to illustrate the impact on performance.
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