A biochemical characterization of feline MHC products: Unusually high expression of class 11 antigens on peripheral blood lymphocytes

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Abstract
The polymorphism of feline MHC antigens was examined using biochemical methods. The following observations were made: (1) feline class I and II antigens are polymorphic. Their biochemical features were established using rabbit and mouse reagents directed against human MHC products; they resemble those observed for other mammalian species; (2) the expression of class II antigens in unstimulated cat peripheral blood lymphocytes (PBLs) appears to be unusually high. Cat PBLs express far more class II than class I antigens, whereas in human Epstein-Barr virus-transformed lines, which are known to express relatively large amounts of class II antigens, the situation is reversed.