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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 ...
a, W: t! H' j3 ntelomerase 发表于 2009-12-15 14:34  + p9 B7 V7 }" y! ~' q7 \" b
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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。& Z1 l/ }0 f; L# c, J
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Unit Definition, \ y- r6 h8 o6 V8 @
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One 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.
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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.
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% {$ F. E1 f5 t* N- _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.2 n5 w) d1 _, v; }- N+ g
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One 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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