HL-A 系统即人体白细胞抗原系统(human Leukocyte antigen,取自为首三字母),因为这些抗原首先在白细胞发现,故名。对于达方面的知识始于移植免疫的探讨,被移植物的存活期与供一受者的 HL-A抗原系统的相容性密切相关。故又有组织相容性系统之称。遗传学上已在第6号染色体鉴别出30个以上的等他基因控制此系统。与人体相当的在小鼠为 H-2系统。H-2系统被 The HL-A system, the human leukocyte antigen (taken from the first three letters), since these antigens are first found in white blood cells, hence the name. As for the aspect of knowledge began with the study of transplantation immunity, graft survival is closely related to the recipient’s HL-A antigen system compatibility. It is also known as a system of organizational compatibility. Genetically, more than 30 isogenic genes have been identified on chromosome 6 to control this system. The equivalent of human H-2 system in mice. H-2 system is