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α_2-巨球蛋白(Alpha-2-Macroglo-bulin,简称α_2M)是人体具有多种生物活性的糖蛋白。分子量725 000。沉降系数17～20S。血清中浓度随年龄和性别而异,波动在140～260mg/dl之间。在一定条件下
Alpha-2-Macroglo-bulin (α_2M) is a kind of glycoprotein with many biological activities. Molecular weight 725 000. Sedimentation coefficient of 17 ~ 20S. Serum concentrations vary with age and gender, fluctuations in 140 ~ 260mg / dl between. Under certain conditions