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Dog Homologue of Human β(2)-Microglobulin

By O. Smithies and M. D. Poulik


The amino-acid sequence of human β(2)-microglobulin, a protein of 100 residues, is related to parts of the constant region of IgG heavy chain. The dog homologue of human β(2)-microglobulin has now been isolated and its amino-acid sequence has been partially determined. The two proteins (human and dog β(2)-microglobulins) are demonstrably different at only 6 or 7 of the 42 positions examined. Use of the dog should permit experimental investigation of the functional relationships of β(2)-microglobulin to immunoglobulins and the immune system. β(2)-Microglobulin has also been detected in serum from a chimpanzee. The gene for β(2)-microglobulin may correspond to the end portion of an immunoglobulin heavy chain gene

Topics: Biological Sciences: Immunology
Year: 1972
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Provided by: PubMed Central
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