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Journal of Dairy Science Vol. 52 No. 2 258-260
© 1969 by American Dairy Science Association ®
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Identification of Amino Compounds Derived from {kappa}-Casein during Storage1

P. C. Tatto2 and S. Nakai3

Division of Animal Science, University of British Columbia,,4 Vancouver

ABSTRACT

Low molecular weight amino compounds derived from {kappa}-casein by sterilization and during storage were identified with an amino acid analyzer and by thin-layer chromatography. Ammonia and a small amount of cysteic acid were detected. Ammonia was derived mainly from amides by heat degradation, and cysteic acid by oxidation of cystine in {kappa}-casein. Also, a decrease in histidine residues in the protein fraction of stored {kappa}-casein was observed

FOOTNOTES

1 Supported by an Operating Grant A-3641 of the National Research Council of Canada

2 Present address, Fraser Valley Milk Producers' Association, Vancouver.

3 All correspondence to be addressed to S. Nakai.

4 Now with the Department of Food Science.






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Copyright © 1969 by the American Dairy Science Association ®.