HLA-I类和Ⅱ类抗原的分子结构 重厚泽重通万■ Class I molecule Class II molecule Peptide-binding (2 cleft Membrane-distal domains Membrane-proximal domains B2-microglobulin (g-fold structure) 9997X99997999 999799990798 Transmembrane segment g6888888388 Cytoplasmic tail HLA-Ⅰ类和Ⅱ类抗原的分子结构