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Abstract
The binding property of bovine IgG2 to staphylococcal Protein A was investigated by the methods of gel filtration chromatography and affinity chromatography. High performance gel filtration chromatography was carried out using TSK gel G3000SW and G2000SW columns, and immobilized Protein A column was used for affinity chromatography. Although bovine IgG2 did not form any precipitin lines with Protein A by double diffusion method on agar gel, IgG2 could bind to immobilized Protein A column. Moreover, by gel filtration chromatography, peaks of the complex between bovine IgG2 and Protein A were observed in addition to the IgG2 monomer peak. Thus, it is concluded that bovine IgG2 interacts with staphylococcal Protein A and forms “soluble complexes”. Carbethoxylated IgG2 lost its affinity to Protein A indicating that histidyl residues in IgG2 is essential for the binding to Protein A.
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Article info
Publication history
Accepted:
September 15,
1988
Received:
November 19,
1987
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Copyright
© 1989 American Dairy Science Association. Published by Elsevier Inc.
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