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Casein Phosphopeptides from Casein Micelles by Successive Digestion with Pepsin and Trypsin
Author(s) -
Tomotada Ono,
Yasushi Takagi,
and Isao KUNISHI
Publication year - 1998
Publication title -
bioscience biotechnology and biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.509
H-Index - 116
eISSN - 1347-6947
pISSN - 0916-8451
DOI - 10.1271/bbb.62.16
Subject(s) - trypsin , casein , pepsin , chemistry , micelle , chromatography , digestion (alchemy) , calcium , phosphate , biochemistry , enzyme , organic chemistry , aqueous solution
When milk is ingested, casein micelles will be successively digested by pepsin in the stomach and trypsin in the intestine. Therefore, we digested casein micelles successively with pepsin at pH 4.0 and trypsin at pH 7.0, and recovered casein phosphopeptides (CPP) as CPP-calcium phosphate (CP) complexes. The CPP-CP complexes contained 248 mg of calcium/g peptides and 175 mg of inorganic phosphorus/g peptides, which were higher than those of CPP-CP complexes driven from acid-precipitated casein and casein micelles by tryptic digestion only. It contained more alpha S1-CN-5P(f59-79) than the other CPP preparations did.

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