A kind of hepatocyte growth factor was purified from cowplacenta through high speed centrifugation, salting out, affinity chromatography, ultrafiltration and anion exchange chromatography.
用高速离心、分段盐析、亲和层析、超滤和阴离子交换层析法,从牛胎盘中分离纯化出一种肝细胞生长因子。
2
The structure of placenta and unsuitable raising management often lead to retention of the afterbirth which it brings to the greatest loss of the reproduction of cow industry.