B7是一类在活化的抗原呈递细胞(APC)表面的外周膜蛋白,能与T细胞表面的CD28或CD152(CTLA-4)等蛋白识别,从而与MHC-TCR识别形成“共刺激”信号或“共抑制”信号[1][2]。 其中,APC的B7与T细胞的CTLA-4的结合会抑制T细胞的活性。
家族成员
B7-1和B7-2以及另外几种蛋白构成了B7家族,如下表所示:
参考文献
Wikiwand in your browser!
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.