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Polymorphism in the Red Protein isolated from Milk of Individual Cows

Naturevolume 207pages10071008 (1965) | Download Citation



GENETICALLY determined polymorphism of human and other primate transferring, the iron-binding proteins in blood, has been established by starch-gel electrophoresis1,2. The transferrin in cattle differs from that in humans since cattle homozygous for an allele have been shown to contain more than one transferrin3,4. The red protein, also called lactotransferrin, is an iron-binding protein found in cow's milk and has now been found to be polymorphous by gel electrophoresis. Although serum transferrin resembles the red protein in size, absorption spectra, and amount of iron bound per mole of protein, it differs in electrophoretic mobility and amino-acid content5,6.

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  1. U.S. Department of Agriculture, Eastern, Regional Research Laboratory, Philadelphia, 18, Pennsylvania

    • M. L. GROVES
    •  & R. F. PETERSON
  2. Animal Husbandry Research Division, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, Maryland

    • C. A. KIDDY


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