Journal
ANALYTICAL BIOCHEMISTRY
Volume 409, Issue 1, Pages 123-129Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ab.2010.10.001
Keywords
Protein A; Affinity; Nonspecific; Phosphorylcholine; High throughput
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Activated media allow the user to easily synthesize a variety of affinity media. We have developed a novel activated medium based on porous silica modified with phosphorylcholine (PC) and N-hydroxy-succinimide (NHS) groups for the purpose of high-throughput purification and reducing nonspecific protein adsorption. The PC groups function as suppressors of nonspecific protein adsorption, whereas the NHS groups are able to covalently bind to the primary amino groups of ligands. Because protein A affinity medium is the most frequently used affinity medium, we prepared protein A media in which a recombinant protein A was bound to the NHS groups of the activated media and evaluated its utility. After optimizing various factors in the synthetic process, the resultant protein A medium showed improved durability at a high flow rate over 300 purification cycles and reduced nonspecific protein adsorption compared with commercially available protein A media. (C) 2010 Elsevier Inc. All rights reserved.
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