Human Casein and its Caseino-glycopeptide

WHEN rennin is allowed to react with caseins prepared from milk of different ruminant species at neutral p H and in the presence of calcium, paracasein precipitates and the supernatant contains a glycopeptide, called caseino-glycopeptide 1 : it does not dialyse, and remains soluble in 12 per cent tr...

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Bibliographic Details
Published in:Nature (London) 1962-12, Vol.196 (4859), p.1098-1099
Main Authors: ALAIS, CHARLES, JOLLÈS, PIERRE
Format: Article
Language:English
Subjects:
Caseins
Glycopeptides
Humanities and Social Sciences
Humans
letter
multidisciplinary
Old Medline
Peptides
Science
Science (multidisciplinary)
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Summary:WHEN rennin is allowed to react with caseins prepared from milk of different ruminant species at neutral p H and in the presence of calcium, paracasein precipitates and the supernatant contains a glycopeptide, called caseino-glycopeptide 1 : it does not dialyse, and remains soluble in 12 per cent tri-chloroacetic acid (TCA). We prepared and analysed recently the caseino-glycopeptides from cow, goat and sheep caseins, which are analogous but not identical substances 1 . In the case of cow's casein the glycopeptide was obtained from χ-casein by rennin digestion in the absence of calcium 1 . χ-casein has been analysed 2 and seems to be the specific substrate for rennin. In this paper we want to report the amino-acid composition of human casein and to comment on some results concerning its digestion by rennin.
ISSN:0028-0836
1476-4687
DOI:10.1038/1961098a0