The group of closed linked genes coding for antigens that play a major role in tissue incompatibility and that function in regulation and other aspects of the immune response.

• 主要组织相容性复合体,包含一个在巨大基因簇的大染色体区域,这些基因紧密连锁,编码一组抗原,这些抗原在组织不相容性、免疫调控和其他免疫应答中发挥主要作用。