凝血因子ⅩⅢ是血浆中的一种酶原,在血循环中以有活性的亚单位A的二聚体和运载蛋白亚单位S的二聚体相结合而存在,过去,因子ⅩⅢ被认为在肝脏合成,但有人用免疫荧光法发现它存在于骨髓巨核细胞和胎盘细胞中,Ikematsu报告用免疫过氧化酶技术可在肝细胞中检出。但有人认为该因子的浓度与肝功试验关系不大,肝脏正常血浆中的因子ⅩⅢ浓度也可能 Factor XIII, a zymogen in plasma, is present in the blood circulation by a combination of the dimer of the active subunit A dimer and the transporter subunit S, which in the past was thought to be synthesized in the liver , But it was found by immunofluorescence in bone marrow megakaryocytes and placental cells, Ikematsu reported using immunoperoxidase technology can be detected in liver cells. However, some people think that the concentration of the factor has little to do with the liver function test, the normal plasma concentration of factor Ⅹ Ⅲ may also be