Fas是一种标识符,与肿瘤坏死因子受体6相似(TNF receptor superfamily, member 6),它是一种细胞表面受体,是一种促进细胞凋亡基因,在多种细胞和组织中存在。Fas receptor (FasR)是Fas受体,Fas ligand or FasL is a type II transmembrane protein.FasL是一种II型跨膜蛋白质。Fas ligand functions as a homotrimer, because it trimerizes FasR, which spans the membrane of the "target" cell. This trimerization usually leads to apoptosis, or cell death.FasL功能上是一个同源三分子缩合物,它可以使FasR产生三聚作用,从而跨过靶细胞膜是细胞凋亡或者死亡