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Proteinase K from Tritirachium album

Reagents designed and manufactured under current ISO 13485 certification.

Endopeptidase K
CAS Number:
Enzyme Commission number:
EC Number:
MDL number:

Quality Level


for molecular biology


buffered aqueous glycerol solution

mol wt

28.93 kDa


≥10 mg/mL protein
≥800 unit/mL


≤500 pg/mg DNA (PicoGreen® assay)


diagnostic assay manufacturing

foreign activity

DNAse, RNAse, exonuclease, endonuclease, and nickase, none detected

shipped in

wet ice

storage temp.


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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 μmole of tyrosine per min at pH 7.5 at 37 °C (color by Folin-Ciocalteu reagent).

Legal Information

PicoGreen is a registered trademark of Life Technologies


Exclamation markHealth hazard

Signal Word


Hazard Statements

Precautionary Statements

Hazard Classifications

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

Target Organs

Respiratory system

Storage Class Code

10 - Combustible liquids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Origin

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More Documents

Quotes and Ordering

Eva Dvorakova et al.
BMC neurology, 13, 126-126 (2013-09-26)
The accumulation of the misfolded forms of cellular prion protein, i.e. prions (PrPSc), in the brain is one of the crucial characteristics of fatal neurodegenerative disorders, called transmissible spongiform encephalopathies (TSEs). Cellular prion protein is normally linked to the cell
Fangzhong Yuan et al.
Journal of molecular neuroscience : MN, 51(1), 219-224 (2013-05-30)
Prion diseases characterize a category of fatal neurodegenerative diseases. Although reports have increasingly shown that oxidative stress plays an important role in the progression of prion diseases, little is known about whether oxidative stress is a cause or a consequence
Jessica Varela Villarreal et al.
Journal of microbiological methods, 94(3), 161-169 (2013-07-03)
Molecular techniques, such as polymerase chain reaction (PCR) and quantitative PCR (qPCR), are very sensitive, but may detect total DNA present in a sample, including extracellular DNA (eDNA) and DNA coming from live and dead cells. DNase I is an
Yi-sheng Chen et al.
Archives of microbiology, 196(3), 193-199 (2014-02-05)
Lactobacillus plantarum 510, previously isolated from a koshu vineyard in Japan, was found to produce a bacteriocin-like inhibitory substance which was purified and characterized. Mass spectrometry analysis showed that the mass of this bacteriocin is 4,296.65 Da. A partial sequence, NH2-
Neetu Kumra Taneja et al.
Journal of bacteriology, 195(22), 5102-5111 (2013-09-10)
Bordetella pertussis is the causative agent of pertussis, a highly contagious disease of the human respiratory tract. Despite very high vaccine coverage, pertussis has reemerged as a serious threat in the United States and many developing countries. Thus, it is


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