Proteinase K MBG Solution

Proteinase K (Molecular Biology Grade Solution) is a serine peptidase with a very high specific activity and a broad spectrum of protein digestion possibilities.

The solution is designed to be used for protein degradation (up to tetrapeptides) during the cell lysis and RNA/DNA extraction procedures under hush reaction conditions such as the higher temperatures and the presence of detergents. The enzyme efficiently degrades DNases and RNases during nucleic acid isolation process. The high purity of the Proteinase K and controlled absence of both DNAse and RNase contamination ensures the integrity of nucleic acids.

The 100% enzyme activity (when stored at -20°C) is guaranteed for at least two years after production. However, the experiments proved that the proteinase remains close to 90% active even when stored at +37°C for 18 months.

The enzyme is supplied as a 20 mg/ml concentrated solution with an average specific activity of more than 800 u/ml.
• Active in all common buffers used for cell lysis and RNA/DNA extraction, in a presence of urea, SDS and guanidinium salts
• Stable at high temperature of up to 56°C
• Can be inactivated by heating at 65oC for 20 minutes or at 75oC for 10 minutes
• Active in a pH range of 4–12 with an optimum pH 7.5–8.0
• The Proteinase K gene from album expressed in yeast host.
• The quality limit of allowed host DNA presence is ≤ 0.25 pg/U measured by qPCR what is about a half when compared to other suppliers.

Please contact us at for specific academic pricing.