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Sulphydryl and disulphide groups in casein

Published online by Cambridge University Press:  01 June 2009

G. M. Wallace  and
K. R. Aiyar
G. M. Wallace
Affiliation:
Food Technology Department, Massey University, Palmerston North, New Zealand
K. R. Aiyar
Affiliation:
Food Technology Department, Massey University, Palmerston North, New Zealand
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Summary

The method of Gaitonde (1967) was adapted for the measurement of cysteine and cystine in acid hydrolysates. Analysis of 3 different casein preparations indicated the presence of both cysteine and cystine in whole casein in the proportions of 1:1 by weight and in the molecular ratio of 2:1. If all the cysteine and cystine is associated with κ-casein then it appears that one mole of the latter contains 2 moles of cysteine and 1 mole of cystine. The sulphydryl group in whole casein appears not to be highly labile.

Type
Original Articles
Information
Journal of Dairy Research , Volume 36 , Issue 1 , February 1969 , pp. 115 - 123
Copyright
Copyright © Proprietors of Journal of Dairy Research 1969

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