- High activity - broad-spectrum serine protease
- Active under denaturing conditions - useful for a variety of applications
- Stable - at high temperatures
- Molecular biology grade - useful for general digestion of proteins
- Proteinase K is also available in powder form
Proteinase K is a highly active serine protease (MW 28,500 Da) isolated from the fungus Tritirachium album. The enzyme exhibits broad cleavage specificity on native and denatured proteins and is widely used in the purification of native RNA and DNA from tissues or cell lines. Because the solution is tested for the absence of RNases and DNases, it is especially suitable for isolating PCR and RT-PCR templates.
The activity of Proteinase K is increased in the presence of denaturants such as SDS (1%) and at elevated temperature (50-60°C). The recommended working concentration is 50-100 µg/mL for protein removal and enzyme inactivation and up to 2 mg/mL for tissue treatment.
Proteinase K products are free of detectable DNase and RNase.
- Inactivation of RNases/DNases during nucleic acid extraction
- Protein modification
- General protein digestion
- Determination of enzyme localization
- Remove nucleases for in situ hybridization
- Improving cloning efficiency of PCR products
We’ve started building a collection of short written and video reviews that we share online with the research community. Would you like to share your experience of the Proteinase K Solution as part of our new customer review program? To watch or read our reviews, to learn more about the rewards being offered, or to post your own review, please click here
Certification of Analysis (COAs)
Proteinase K Solution (20mg/ml)
5 x 5 mL
Proteinase K is available as a powder or as a stabilized ready-to-use 20 mg/mL (600 mAU/mL) stock solution using a specially formulated calcium acetate buffer.
Storage & Stability
Proteinase K can be stored for 12 months at -20°C.
On Dry Ice or Blue Ice.