major histocompatibility complex(redirected from Histocompatibility molecule)
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major histocompatibility complex[′mā·jər ¦hi·stō·kəm′pad·ə′bil·əd·ē ′käm‚pleks]
In vertebrates, a family of genes that encode cell surface glycoproteins that regulate interactions among cells of the immune system, some components of the complement system, and perhaps other related functions connected with intercell recognition. Abbreviated MHC.