6-巯基嘌呤一水合物,6-Mercaptopurine monohydrate;Pharmaceutical Secondary Standard; Certified Reference Material
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4-硝基苯甲酸,4-Nitrobenzoic acid;98%
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MS基础培养基 [MS培养基],Murashige and Skoog Basal Medium;powder, suitable for plant cell culture
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Fmoc-S-(4-甲基苄基)-L-半胱氨酸,Fmoc-Cys(4-MeBzl)-OH;99%
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凝血酶来源于牛血浆,Thrombin from bovine plasma [Factor IIa];≥60 NIH units/mg protein (biuret)
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羟乙基哌嗪乙硫磺酸,HEPES, Free Acid, ULTROL® Grade;A zwitterionic N-substituted aminosulfonic acid buffer. Useful in the pH 6.8-8.2 range. Has a pKa of 7.48 at 25°C. Absorbance (1.0 M, H2O, 260 nm):≤0.05.
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3-甲基-2-氧基戊酸钠盐,(±)-3-Methyl-2-oxovaleric acid sodium salt;≥98%