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重组肠激酶

产品简介

本产品为基因重组的高活性高纯度牛肠激酶轻链,是一种切割位点高度专一的蛋白
酶。识别序列DDDDK,在赖氨酸残基的C 端切割多肽。该酶可将带有识别序列的融合
蛋白切开。肠激酶在很多反应条件下仍保持活性,可以在较宽pH 范围(4.5-9.5),较宽
温度范围(4-45℃)以及多种去污剂和变性剂存在条件下有效切割融合蛋白。

纯度

经SDS-PAGE 电泳分析,大于95%。

活性单位

一个活性单位定义为在23℃条件下,8 小时将 50μg 胰蛋白酶原95%转化为胰蛋白酶
所需的酶量。

酶切条件

融合蛋白 1~1.5mg/ml (100μl)
重组肠激酶 2~3U
10×缓冲液 10μl
温度(℃) 23
时间(小时) 8~12

保存条件

-20℃保存。

 

Recombinant Enterokinase

Description

Recombinant enterokinase (rEK) is the catalytic subunit of bovine enterokinase, which is and purified to yield a high enzyme activity preparation. rEK recognizes the sequence Asp-Asp-Asp-Asp-Lys and cleaves the peptide bond after the lysine residue. The enzyme can be used to cleave any fusion protein that carries this sequence.

Unit Definition:

One unit of rEK is the amount of enzyme required to digest 50ug of thioredoxin-NP-27 fusion protein to 95% completion in 8 hours at 23℃.

Storage:

rEK in 50 mM potassium phosphate, pH 8.0, 500 mM NaCl and 50% glycerol should be stored at -20°C. Guaranteed stable for 1 year when stored properly.

10x Reaction Buffer:

500 mM Tris-HCl, pH 8.0 (22°C), 10 mM CaCl2, 1% Tween-20.

 

 
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