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Proteinase K Activity In Commonly Used Buffers

Source-1:
The table below is directly taken from Finnzymes website.

Buffer Application Example Activity (%)
20 mM Tris-HCl, pH 8.0 Reference 100
10 mM Tris-HCl, 1 mM EDTA, 0.5 % SDS, pH 8.0 Bacterial genomic DNA isolation 108
10 mM Tris-HCl, 100 mM NaCl, 25 mM EDTA, 1 % SDS, pH 8.0 Genomic DNA isolation from mammalian tissues 171
100 mM Tris-HCl, 100 mM EDTA, 250 mM NaCl, 1 % Sarkosyl, pH 8.0 Plant tissue genomic DNA isolation 118
10 mM Tris-HCl, 50 mM NaCl, 1 mM DTT, 5 mM EDTA, 0.5 % SDS, pH 7.9 Inactivation of Calf Intestinal Alkaline Phosphatase 104
50 mM Tris-HCl, 1 mM CaCl2, 3 mM DTT, 2 M Urea, pH 8.0 Denaturation of proteins 66
10 mM Tris-HCl, 1.5 mM MgCl2, 50 mM KCl, 0.1 % Triton X-100, pH 8.8 Optimized DyNAzyme Buffer 158
50 mM Tris-HCl, 1.5 mM MgCl2, 15 mM (NH4)2SO4, 0.1 % Triton X-100, pH 9.0 Optimized DyNAzyme EXT Buffer 168

Source-2:
The following information is directly taken from NEB website.

Buffer: 30 mM Tris HCl, pH 8.0
Application: Reference
Relative activity (approx.): 100%

Buffer: 50mM Tris-HCl, pH 8.0, 1mM CaCl2,3mM DTT, 2.0M Urea
Application: Denaturation of proteins
Relative activity (approx.): 70%

Buffer: 100mM Tris-HCl, pH 8.0, 100mM EDTA, 250mM NaCl, 1% Sarkosyl
Application: Plant tissue DNA isolation
Relative activity (approx.): 120%

Buffer: 10mM Tris-HCl, pH 8.0, 1 mM EDTA, 0.5% SDS
Application: Bacterial DNA isolation
Relative activity (approx.): 100%

Buffer: 10mM Tris HCl, pH 8.0, 50mM NaCl, 5mM EDTA, 1mM DTT, 0.5% SDS 50mM Tris-HCl, pH 8.0
Application: Denaturation of CIP
Relative activity (approx.): 100%

Buffer: 50mM EDTA, 5% Tween 20, 0.5% Triton-X 100, 800mM GuHCl
Application:
Relative activity (approx.): 300%