Fibronectin(FN)is a macromolecular glucoprotein with multi-fun ctions.For present, it has been found that FN is mainly composed of three subty pes: fetal FN, plasma FN and cellular FN.

• 纤维结合蛋白是一种多功能的大分子糖蛋白,目前发现其主要有3个亚型,即胎儿型、血浆型和细胞型。