Abstract
WE have investigated variations in the αs-casein fraction1, the calcium-sensitive component of α-casein and a major protein fraction of the casein family. Recently, Aschaffenburg2 demonstrated the heterogeneity of β-casein and also noted the presence of γ-casein variants. The existence of 5 out of 6 possible phenotypes for β-casein was shown by paper electrophoresis in a citrate–phosphate–urea buffer at pH 7.15. The evidence presented suggested that β-casein polymorphism may be restricted to Channel Island breeds. Heterogeneity of αs;-casein fraction was not noted.
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References
Waugh, D. F., and von Hippel, P. H., J. Amer. Chem. Soc., 78, 4576 (1956).
Aschaffenburg, R., Nature, 192, 431 (1961).
Wake, R. G., and Baldwin, R. L., Biochim. et Biophys. Acta, 47, 225 (1961).
Hipp, N. J., Groves, M. L., Custer, J. H., and McKeekin, T. L., J. Dairy Sci., 35, 272 (1952).
Ribadeau Dumas, B., Biochim. et Biophys. Acta, 54, 400 (1961).
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THOMPSON, M., KIDDY, C., PEPPER, L. et al. Variations in the αs-Casein Fraction of Individual Cow's Milk. Nature 195, 1001–1002 (1962). https://doi.org/10.1038/1951001a0
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DOI: https://doi.org/10.1038/1951001a0
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