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Merck

V900887

Sigma-Aldrich

蛋白酶 K 来源于林伯氏白色念球菌

Vetec, reagent grade, powder, ≥30 units/mg protein

别名:

肽链内切酶

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About This Item

CAS号:
EC號碼:
MDL號碼:
分類程式碼代碼:
12352204

等級

reagent grade

產品線

Vetec

形狀

powder

比活性

≥30 units/mg protein

分子量

28.93 kDa

技術

DNA extraction: suitable

異物活動

Dnase ≤30 units/mg solid

儲存溫度

−20°C

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應用

在分离DNA和RNA的过程中,用于核酸酶的蛋白水解失活。
用于去除内毒素结合的阳离子蛋白,如溶菌酶和核糖核酸酶A。
据报道,其可用于分离肝、酵母和绿豆线粒体
用于测定酶在细胞膜上的定位
用于石蜡包埋组织切片的处理,暴露用于抗体标记的抗原结合位点。
用于可传播海绵状脑病(TSE)研究中朊病毒脑组织样本蛋白的消化。

生化/生理作用

蛋白酶K是一种稳定且具有高活性的丝氨酸蛋白酶。晶体和分子结构研究证据表明该酶属于枯草素家族,具有活性位点催化三联体(Asp39-His69-Ser224)。它在一系列广泛的环境中均稳定:pH,缓冲盐,去污剂(SDS)以及温度。 在0.1-0.5% SDS存在的情况下,蛋白酶K可保持活性,在不损害分离DNA完整性的前提下,可以消化DNA制剂中的多种蛋白质和核酸酶。

單位定義

在pH 7.5、37摄氏度条件下,一单位酶每分钟水解尿素变性的血红蛋白产生的颜色强度,相当于1.0微摩酪氨酸。

法律資訊

Vetec is a trademark of Merck KGaA, Darmstadt, Germany

象形圖

Health hazardExclamation mark

訊號詞

Danger

危險分類

Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3

標靶器官

Respiratory system

儲存類別代碼

11 - Combustible Solids

水污染物質分類(WGK)

WGK 1

閃點(°F)

Not applicable

閃點(°C)

Not applicable


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