推荐几种反应结合液:
Buffer1:
30 mM Tris·Cl(pH 8.0); 30 mM EDTA; 5% Tween 20; 0.5% Triton X-100;
800 mM GuHCl
Buffer2:
36 mM Tris·Cl(pH 8.0); 36 mM EDTA; 5% Tween 20; 0.36% Triton X-100;
735 mM GuHCl
备注: 1 蛋白酶K的推荐工作浓度为0.5-1mg/ml,0.2%-1%SDS或1-4
M尿素可刺激该酶的活性。
2 Ca2+可以保护蛋白酶K不会自我降解、增加蛋白酶K的热稳定性、调节蛋白酶K的底物结合位点。
3 在宽pH值(4.0-12.5)范围内保持稳定,最佳pH值范围是7.5-8.0。
参考文献:
1. Kraus, E; et.al. Proteinase K from the Mold Tritirachium album
limber, Specificity and Mode of Action. Z. Physiol. Chem., 357:939;
1976.
2. Jany,KD, et al. Amino Acid Sequence of Proteinase K from the
Mold, Tritirachium album limber. Proteinase K; a Subtilisin-related
Enzyme with Disulfide Bonds. FEBS Letter, 199,139.1986.
3. Sambrook, J., Fritsch, E.F. and Maniatis, T. (1989) Molecular
Cloning: A Laboratory Manual, Volume 3, Cold Spring Harbor
Laboratory, Cold Spring Harbor, NY, B.16.
4. Sweeney, P.J. and Walker, J.M. (1993) Enzymes of molecular
biology. In: Methods in Molecular Biology, Vol. 16, M.M. Burrell,
ed., Humana Press, Inc., Totowa, NJ, 305.