Studies on the antigenic structure of bovine beta casein vi. antigenic activities of peptides produced by tryptic and v8 proteolytic digestions of peptide 110 144

Otani, H.; Mine, Y.; Hosono, A.

Milchwissenschaft 43(12): 759-761


ISSN/ISBN: 0026-3788
Accession: 007833792

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Peptides 114-144, 110-121, 122-131 and 132-144 were separated from .beta.-casein cleaved with cyanogen bromide, TPCK-trypsin and V8-protease from Staphylococcus aureus, and their antigenic reactivities with individual rabbit IgG antibody specific to peptide 110-144 were examined in an enzyme-linked immunosorbent assay. Peptide 114-144 had strong binding ability with individual IgG antibody specific to peptide 110-144, whereas no V8-proteolytic peptides, i.e. 110-121, 122-131 and 132-144, exhibited inhibitory activities towards the reaction of peptide 110-144 with its antibody. These results indicated that the antigenic site(s) in region 110-144 is associated with glutamyl peptide bonds at position 121 and/or 131.