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V900887

Sigma-Aldrich

Proteinase K from Tritirachium album

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

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Synonym(s):
Endopeptidase K
CAS Number:
Enzyme Commission number:
EC Number:
MDL number:
UNSPSC Code:
12352204

grade

reagent grade

product line

Vetec

form

powder

specific activity

≥30 units/mg protein

mol wt

28.93 kDa

technique(s)

DNA extraction: suitable

foreign activity

Dnase ≤30 units/mg solid

storage temp.

−20°C

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Application

Useful for the proteolytic inactivation of nucleases during the isolation of DNA and RNA.
Removes endotoxins that bind to cationic proteins such as lysozyme and ribonuclease A.
Reported useful for the isolation of hepatic, yeast, and mung bean mitochondria
Determination of enzyme localization on membranes
Treatment of paraffin embedded tissue sections to expose antigen binding sites for antibody labeling.
Digestion of proteins from brain tissue samples for prions in Transmissible Spongiform Encephalopathies (TSE) research.

Biochem/physiol Actions

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.

Unit Definition

One unit will hydrolyze urea denatured hemoglobin to produce color equivalent to 1.0 micromole of tyrosine per minute at pH 7.5 at 37 deg C.

Legal Information

Vetec is a trademark of Merck KGaA, Darmstadt, Germany

Pictograms

Health hazardExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Target Organs

Respiratory system

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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