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Journal of Dairy Science Vol. 33 No. 5 275-280
© 1950 by American Dairy Science Association ®
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Electrophoresis of Milk Proteins. I. Some Comparisons of Salt-Acid and Salt-Lyophilized Whey Fractions1,2

William G. Stanley, A. C. Andrews and C. H. Whitnah

Department of Chemistry, Kansas State College, Manhattan

ABSTRACT

  1. Electrophoretic patterns were obtained for whey proteins. These proteins were prepared by two different procedures, namely, salt-acid and salt-lyophilized.
  2. Six electrophoretically distinguishable components were split off by electrophoresis of these whey proteins.
  3. No qualitative difference in whey proteins prepared by these methods was recognized.
  4. The electrophoretic concentration of euglobulin by the salt-acid method was less than half the salt-lyophilized value, while for pseudoglobulin the salt-acid value was nearly double the salt-lyophilized.
  5. The change of concentration could have been due to action of HC1 upon the immune lactoglobulins.
  6. Relative percentages of component areas from salt-lyophilized proteins agreed qualitatively with those obtained by Smith and only for one component did areas from salt-acid proteins agree better with the data of Smith and of Deutsch.


FOOTNOTES

1 Contribution no. 399. Department of Chemistry, Kansas Agricultural Experiment Station, Manhattan.

2 This paper contains part of the material presented by William G. Stanley in a thesis for the Master of Science Degree at Kansas State College. 1950.







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Copyright © 1950 by the American Dairy Science Association ®.