The association of bovine SH-κ-casein at pH 7·0
- 1 April 1979
- journal article
- Published by Cambridge University Press (CUP) in Journal of Dairy Research
- Vol. 46 (2) , 271-276
- https://doi.org/10.1017/s0022029900017167
Abstract
SUMMARY: The self-association of SH-κ-casein at pH 7·0 in 0·01 m-EDTA, 0·001 m-dithiothreitol buffer, containing 0·1, 0·2, 0·5 or 1·0 m-NaCl is of a monomer–polymer type. The polymer is a spherical particle, diam. 23 nm and mol. wt 570000 (30 monomers). These parameters are not greatly influenced by variations in ionic strength above 0·1. The critical micelle concentration, which is a property of a monomer–polymer equilibrium, decreases with increasing ionic strength. The standard free energy of association is about – 36 kJ/mol. monomer at 20 °C.Keywords
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