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名称
耐高盐核酸酶(SAN)
货号
S755009-25KU
包装规格
25KU
级别
重组
浓度
expressed in Pichia pastoris
产品介绍
盐活性核酸酶已用于在蛋白质表达和纯化过程中去除 DNA。 Salt active nuclease has been used to remove DNA during protein expression and purification.
生化机理
盐活性核酸酶(SAN)是一种通用的、非特异性核酸内切酶,可切割双链和单链 DNA 和 RNA。SAN 在高于中性 pH 时具有活性。但是,与其他核酸酶不同,它在高 pH、高盐浓度下具有最佳活性。这些特性使 SAN 成为从细胞提取物和蛋白质样品中去除 DNA 的理想选择。DNA 完全降解后的最终产物由 5 个核苷酸的寡核苷酸组成 这种酶降解 DNA 和 RNA 的比率为 10:1。 SAN 在 10-40°C 的温度范围内具有很高的活性。活性的最佳 NaCl 浓度为 0.5 M。但是,SAN 在低盐缓冲液中具有活性。不建议将 1 M NaCl 用于 SAN。活性需要 Mg2 +(>1 mM)。pH 的工作范围高于中性 pH,最佳范围在 8.5-9.5 之间 物理形式:溶于 25 mM Tris-HCl(pH 7.5)、5 mM MgCl2、0.5 M NaCl、0.01% Triton 和 50%(v/v)甘油的溶液 单位定义:一个单位(U)定义为在 37°C 下,30 分钟内,在含 5 mM MgCl2 和 500 mM NaCl 的 25 mM Tris-HCl(pH 8.5,25ºC)中使用 50 μg/ml 小牛胸腺 DNA 在 260 nm 处的吸光度增加量。
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Research chemical

Research chemical; supplied for laboratory research, analysis, inspection, and scientific procurement use.

item number:S755009-25KU
Product model:25KU
level: reorganization
Lead Time:30days
sold 391 Items
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