human leukocyte antigen(redirected from Hla-a antigens)
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human leukocyte antigen[¦yü·mən ¦lü·kə‚sīt ′ant·i·jən]
Any of a group of antigens present on the surface of nucleated body cells that are coded for by the major histocompatibility complex of humans and thus allow the immune system to distinguish self and nonself. Abbreviated HLA.