β-葡萄糖醛酸酶来源于大肠杆菌,β-Glucuronidase from Escherichia coli;≥20,000 units/mg protein, recombinant, expressed in E. coli overproducing strain, lyophilized powder
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五氯化铌,Niobium(V) chloride;anhydrous, powder, 99.995% trace metals basis
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聚乙烯亚胺溶液,Poly(ethyleneimine) solution [PEI];Mr 600,000-1,000,000; ~50% in H2O
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苦玄参苷IA,Picfeltarraenin IA;≥98%
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N-乙酰-L-色氨酸,N-Acetyl-L-tryptophan [NAT, Ac-Trp-OH];Pharmaceutical Secondary Standard; Certified Reference Material
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辣根过氧化物酶,Peroxidase from horseradish [POD, HRP];Type VI, essentially salt-free, lyophilized powder, ≥250 units/mg solid (using pyrogallol)