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β-Lactoglobulin variation in milk from individual cows

Published online by Cambridge University Press:  01 June 2009

C. A. Kiddy ,
R. E. Townend ,
W. W. Thatcher  and
S. N. Timasheff
C. A. Kiddy
Affiliation:
Animal Husbandry Research Division, Beltsville, Maryland (C.A.K. and W.W.T.) and Eastern Utilization Research and Development Division, Philadelphia, Pennsylvania (R.E.T. and S.N.T.) United States Department of Agriculture
R. E. Townend
Affiliation:
Animal Husbandry Research Division, Beltsville, Maryland (C.A.K. and W.W.T.) and Eastern Utilization Research and Development Division, Philadelphia, Pennsylvania (R.E.T. and S.N.T.) United States Department of Agriculture
W. W. Thatcher
Affiliation:
Animal Husbandry Research Division, Beltsville, Maryland (C.A.K. and W.W.T.) and Eastern Utilization Research and Development Division, Philadelphia, Pennsylvania (R.E.T. and S.N.T.) United States Department of Agriculture
S. N. Timasheff
Affiliation:
Animal Husbandry Research Division, Beltsville, Maryland (C.A.K. and W.W.T.) and Eastern Utilization Research and Development Division, Philadelphia, Pennsylvania (R.E.T. and S.N.T.) United States Department of Agriculture
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Summary

The β-lactoglobulin types of 812 individual cows of various breeds were determined by paper and polyacrylamide gel electrophoresis. The results support the hypothesis that β-lactoglobulins A and B are controlled genetically by codominant autosomal alleles (LgA and LgB).

Milks from 5 heterozygous cows (LgA/LgB) were examined by free electrophoresis and column chromatography to estimate the relative quantities of β-A and β-B produced by these animals. The results indicate that β-A and β-B are produced in approximately equal amounts, with β-A being slightly in excess of β-B.

Lacteal secretions were obtained from 2 castrated males and typed for β-lactoglobulin by means of paper electrophoresis. These animals were found to produce β-lactoglobulins (B and AB) consistent with their expected genotypes as deduced from pedigree analysis.

Type
Original Articles
Information
Journal of Dairy Research , Volume 32 , Issue 2 , June 1965 , pp. 209 - 217
Copyright
Copyright © Proprietors of Journal of Dairy Research 1965

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