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U 好像得通过测酶活来确定吧, 胶原酶生物制剂,和化学制剂不一样,U应该每一批都是不同的。很难和质量划上 ...
R) Z i9 |9 Z/ W! f: |7 a# ktelomerase 发表于 2009-12-15 14:34 
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为了楼主的问题,我特意还查了一下,U确实是每批不同。而且还顺带附上除了胶原酶之外的其他酶单位测定的方法。希望对楼主有提示。
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Unit Definition N- l* t& Y. L' L/ o, `0 q/ ]
( E6 t: H: r$ Z7 u6 N% pOne collagen digestion unit liberates peptides from collagen equivalent in ninhydrin color to 1.0 μmole of leucine in 5 hr at pH 7.4 at 37 °C in the presence of calcium ions.. G* I* l8 p' Q4 `
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One FALGPA hydrolysis unit hydrolyzes 1.0 μmole of furylacryloyl-Leu-Gly-Pro-Ala per min at pH 7.5 at 25 °C in the presence of calcium ions. }: V; S6 M) d, @, W7 u1 N% O4 n
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One neutral protease unit hydrolyzes casein to produce color equivalent to 1.0 μmole tyrosine per 5 hr at pH 7.5 at 37 °C.! X+ {6 A5 s7 x6 U( C# f( o" j! P
{3 {% s" l( B2 @6 DOne clostripain unit hydrolyzes 1.0 μmole of BAEE per min at pH 7.6 at 25 °C in the presence of DTT. |
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