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Merck
CN

P2308

Sigma-Aldrich

蛋白酶 K 来源于林伯氏白色念球菌

lyophilized powder, BioUltra, ≥30 units/mg protein, for molecular biology

别名:

肽链内切酶

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About This Item

CAS号:
EC 号:
MDL编号:
UNSPSC代码:
12352204
eCl@ss:
32160410
NACRES:
NA.54

等级

for molecular biology

质量水平

产品线

BioUltra

形式

lyophilized powder

比活

≥30 units/mg protein

分子量

28.93 kDa

组成

Protein, ≥90% biuret

杂质

≤1 ppm DNA

异质活性

DNAse, Nickase and RNAse, none detected

运输

wet ice

储存温度

−20°C

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应用

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。

单位定义

在pH 7.5,37 °C 条件下,一单位的酶每分钟将会尿素变性的血红蛋白以产生与1.0 μ摩尔 (181 μg) 酪氨酸等同的颜色(Folin-Ciocalteu试剂提供的颜色)。

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象形图

Health hazardExclamation mark

警示用语:

Danger

危险分类

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

靶器官

Respiratory system

WGK

WGK 1

闪点(°F)

Not applicable

闪点(°C)

Not applicable

个人防护装备

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

法规信息

常规特殊物品
常规特殊物品

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分析证书(COA)

Lot/Batch Number

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If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

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  1. How should I prepare solutions of Product P2308, Proteinase K? 

    Solutions can be prepared in 25-50 mM Tris-HCl buffer, pH 8.0, containing 1-5 mM Calcium chloride.

  2. How should I store solutions of Product P2308, Proteinase K? 

    Stock solutions in 40% glycerol of at least 20 mg/ml can be stored in 10 mM Tris-HCl buffer, pH 7.5.with 1 mM  calcium acetate (see product P4850). Solutions are also stable at pH 8 at 4°C.

  3. What is the recommended pH range for Product P2308, Proteinase K? 

    Proteinase K is normally used in the pH range of 7.5-8.0.

  4. What amount of Product P2308, Proteinase K, should I use for nucleic acid preparations?

    Amounts for typical usage is 50-200 μg/mL.

  5. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  6. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  7. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  8. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  9. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Mamoru Oshiki et al.
Frontiers in microbiology, 9, 830-830 (2018-05-15)
Detection and genotyping of pathogenic RNA viruses in human and environmental samples are useful for monitoring the circulation and prevalence of these pathogens, whereas a conventional PCR assay followed by Sanger sequencing is time-consuming and laborious. The present study aimed
Margarita Zayas et al.
PLoS pathogens, 12(1), e1005376-e1005376 (2016-01-05)
Hepatitis C virus (HCV) nonstructural protein (NS)5A is a RNA-binding protein composed of a N-terminal membrane anchor, a structured domain I (DI) and two intrinsically disordered domains (DII and DIII) interacting with viral and cellular proteins. While DI and DII
Kumiko Muta et al.
Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association, 31(10), 1615-1623 (2016-05-18)
Although histone acetylation, an epigenetic modification, has been reported to be related to the progression of various diseases, its involvement in nephrosclerosis is unclear. Dahl salt-sensitive rats were used as a model of nephrosclerosis in this study. The rats were
Bahram Peivastegan et al.
BMC plant biology, 19(1), 262-262 (2019-06-19)
Stored potato (Solanum tuberosum L.) tubers are sensitive to wet conditions that can cause rotting in long-term storage. To study the effect of water on the tuber surface during storage, microarray analysis, RNA-Seq profiling, qRT-PCR and phytohormone measurements were performed
Sreenivas Adurthi et al.
Scientific reports, 7(1), 17289-17289 (2017-12-13)
Oestrogen controls Foxp3 expression in regulatory T cells (Treg cells) via a mechanism thought to involve oestrogen receptor alpha (ERα), but the molecular basis and functional impact of ERα signalling in Treg cells remain unclear. We report that ERα ligand

商品

Proteinase K aids in molecular biology applications by digesting structural proteins, removing nucleases, and isolating intact genomic DNA.

Pro K aids in disrupting cell membranes for DNA release, crucial for downstream molecular biology techniques.

In blood DNA extraction, Proteinase K, an enzyme commonly used to degrade proteins, can help break down the cellular and nuclear membranes, releasing DNA from the cells that protect it from degradation and increase purity/yield making it more suitable for various molecular biology techniques.

Guidelines on use of proteinase K, an enzyme commonly used to degrade proteins, and protect DNA and RNA from degradation in samples.

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实验方案

GenElute 哺乳动物基因组 DNA 纯化方案阐述了从多种哺乳动物来源中分离纯高分子量 DNA 的方法。

The GenElute™ Blood Genomic DNA Kit Protocol provides a simple and convenient way to isolate pure genomic DNA from fresh or aged whole blood.

The GenElute Mammalian Genomic DNA Purification Kit Protocol describes the isolation of pure, high molecular weight DNA from a variety of mammalian sources.

Proteinase K activity measured via spectrophotometry using hemoglobin substrate, crucial for enzyme characterization.

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