HLA-B| Human HLA class I histo

Assembly of Matched Alpha/Beta Subunits to HLA Class II Peptide Receptors

Human antigen presenting cells express three human leukocyte antigen (HLA) class II isotypes (DR, DP, and DQ), which are composed of polymorphic α and β subunits. The combination of polymorphic α- and β-chains results in cis (encoded

人白细胞抗原(human leukocyte antigen，HLA)

gene)。人的定位MHC在第6号染色体上，小鼠的则定位在第17号染色体上。 组织相容性抗原按其免疫性能可分为三类：第一类是移植抗原(transplanta—tion antigen)，负责排斥外来的组织，存在于杀伤性T淋巴细胞(killer T leukocyte)中，为细胞介导的免疫反应所必需，小鼠的I类基因编码H2-K和H2-D／L蛋白质，人的I类基因编码移植抗原HLA-A，B，C；第二类是参与免疫反应过程中细胞之间的信息传递，人的Ⅱ类区称为HLA-D，又可分为4个亚区，排列顺序为DR，DQ

Human Leukocyte Antigen (HLA) Typing by DNA Sequencing

DNA sequencing is a powerful technique for identifying allelic variation within the human leukocyte antigen (HLA) genes. Sequencing is usually focused on the most polymorphic exons of the class I (HLA-A, -B, -C) and class II (HLA-DR, -DQ