Description 描述：A concentrated, ready to use liquid formulation. Proteinase K prepared at 20 mg/ml in 10 mM Tris-HCl, 1 mM calcium acetate, pH 7.5 containing 50% glycerol. DNase- and RNase- free.Activity/Specification：≥400 units per milliliter网站链接：http://www.worthington-biochem.com/PROK/cat.html