According to the analysis on SDSPAGE and Western-blots, early placenta fibronectin(epFN) was similar to term placenta fibronectin(tpFN),both are composed of two 250kD subunits,larger than 220kD subunits of plasma fibronectin(pFN).

• 经还原及非还原SDS－PAGE和免疫印迹电泳分析，epFN分子量约500kD，是由两个250kD亚基组成，与人足月胎盘纤维连接蛋白（termplacentafibronectin，简称tpFN）相似，而大于人血浆纤维连接蛋白（plasmafibronectin，pFN）。