New protein Y isolated from bacterial protein mixture

摘要

New proteins (I), designated 'proteins Y', are new. (I) are protein A/G adequate and are obtained by separation of a bacterial protein mixture using an avian immunoglobulin Y (IgY), especially by culturing Streptococcus suis followed by affinity chromatographic purification of the culture supernatant on 'Sepharose' (RTM) coupled with IgY (IgY/'Sepharose'). Also claimed are: (1) IgY/'Sepharose', obtained by coupling IgY with 'Sepharose', specifically where the 'Sepharose' is ECH-'Sepharose' (ECH = epoxy coupled 6-aminohexanoic acid), and (2) the preparation of (I) as described above.