Human placenta. Negative for HBsAg, HCV, HIV1 and HIV2 Purity Human collagen type IV 95%. Other human collagens below 5%. Non-collagen proteins below 0.5%
纯化方法
Partial pepsin digestion in acidic conditions and differential salt precipitation
纯度
Human collagen type IV 95 %. Other human collagens below 5 %. Non-collagen proteins below 0.5 %