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Journal Article
Research Support, Non-U.S. Gov't
Purification of immunoglobulins G by protein A/G affinity membrane chromatography.
Journal of Chromatography. B, Biomedical Sciences and Applications 1999 Februrary 20
An affinity membrane grafted with protein A/G or protein A was characterized for human and mouse immunoglobulins G purification. Breakthrough curves up to ligand saturation were measured and used to study the effects of flow velocities, feed solution concentrations and protein A/G versus protein A membranes. Increased flow-rate did not decrease the amount of IgG bound to the membranes. Increased feed solution concentration allowed more IgG to bind prior to breakthrough. Kinetic parameters for immunoglobulins G sorption to immobilized protein A were measured in batch experiments. The static binding capacity was determined to be 6.6 mg ml(-1) membrane volume. Finally, this affinity membrane was used to purify IgG from cell culture supernatant. The electrophoresis of the purified IgG fractions did not show any contaminant.
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