酶学委员会编号: 3.5.2.6 酶活单位定义:37摄氏度,pH7.0,每小时水解一个单位青霉素G的酶量 头孢菌素酶(Cephalosporinase)又称II型β-内酰胺酶(β-lactamase type II,EC 3.5.2.6),可水解β-内酰胺类抗生素的β-内酰胺环,从而使其失去抗微生物活性。本品是采用基因工程技术获得的重组孢菌素酶,通过构建孢菌素酶高效表达工程菌株和发酵纯化获得高纯度、活性高产品。本品可有效水解头孢类抗生素,对头孢羟氨苄、头孢拉定、头孢克洛、头孢呋辛、头孢克肟、头孢哌酮、头孢噻肟、头孢曲松等具有作用。 应用: 可用于β-内酰胺类抗生素原料及其制剂的无菌检测和微生物限度检测,即《中国药典》规定的β-内酰胺类抗生素无菌检测(中华人民共和国药典2020版四部附录无菌检查法)和微生物限度检测(中华人民共和国药典2020版四部附录微生物限度检查法),也作为美国药典29版中无菌检测(USP-NF General Chapters 71 STERILITY TEST)规定的试剂使用。
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头孢菌素酶 (来自芽孢杆菌)
CAS number:unknown molecular formula:
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| Chinese alias | - | ||
| English alias | - | ||
| CAS number | unknown | molecular formula | |
| molecular weight | - | Exact mass | - |
| PSA | - | logp | - |
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