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- 详细信息
- 询价记录
- 文献和实验
- 技术资料
- 保质期:
两年
- 英文名:
Proteinase K
- 库存:
99
- 供应商:
江蓝纯
- CAS号:
39450-01-6
属性
| 密度 | 1.1000 |
| 存贮条件 | -20℃保存。 |
描述
| 产品介绍 | 蛋白酶K是一个稳定,高活性丝氨酸蛋白酶。从晶体和分子结构研究的证据表明这种酶属于枯草杆菌家族,带有活性催化位点催化三键(Asp39,His69 - Ser224)。它是在宽的的环境范围内保持稳定:pH值,缓冲盐,去垢剂(SDS),和温度。在0.1-0.5% SDS存在下,在分离DNA中,蛋白酶K保持活性,消化各种蛋白质和核酸酶。 |
| 别名 | 蛋白酶K ;Proteinase K;Endopeptidase K Prok Protease K Tritirachium album proteinase K |
| 生化机理 | Proteinase K is a stable and highly reactive serine protease. Evidence from crystal and molecular structure studies indicates the enzyme belongs to the subtilisin family with an active-site catalytic triad (Asp39-His69-Ser224). It is stable in a broad range of environments: pH, buffer salts, detergents (SDS), and temperature. In the presence of 0.1-0.5% SDS, proteinase K retains activity and will digest a variety of proteins and nucleases in DNA preparations without compromising the integrity of the isolated DNA. |
| 备注 | Unit Definition One unit will hydrolyze urea-denatured hemoglobin to produce color equivalent to 1.0 μmole of tyrosine per min at pH 7.5 at 37 °C (color by Folin-Ciocalteu reagent). |
| 应用 | 分离DNA和RNA期间使核苷酸酶蛋白失活。 去除内毒素对阳离子蛋白的约束,如溶菌酶和核糖核酸酶。 研究报告显示用于分离肝,酵母,绿豆线粒体 测定细胞膜上的酶 用于抗体标记,石蜡包埋组织切片中暴露抗原结合位点。 消化脑组织样本中的蛋白质,用于朊病毒的传染性海绵状脑病(TSE)的研究 |
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文献和实验来源: 源于白色念球菌(Tritirachium album) 反应条件: 蛋白酶K在较广的缓冲液pH范围(pH 4-12.5), 温度范围(37-60℃), 盐浓度(如: 3 M GuHCl)或尿素(4 M)条件下均有活性。在一些去污剂如: Tween20(5%), Triton X-100 (1%)和SDS(1%)条件下也有活性 比活性: 30 units/mg
Mapping Protein Distributions on Polytene Chromosomes by Immunostaining
INTRODUCTION The formidable size and structure of polytene chromosomes allow mapping of chromosomal protein distributions at very high resolution. This protocol describes the preparation of polytene chromosomes from Drosophila larvae
Combined 3C-ChIP-Cloning (6C) Assay: A Tool to Unravel Protein-Mediated Genome Architecture
-galactopyranoside (X-gal; 25 mg/mL in DMF [dimethylformamide]) Agarose gel (1%, UltraPure; Invitrogen) Antibody, specific for the protein of interest Bead eluting buffer Bovine serum albumin (BSA; 0.5% in PBS; New England Biolabs) Cell
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