Enzyme vial (supplied with (Hepatocyte Isolation System Kit , Catalog No. H2006-02) that contains 20,000 units of collagenase and 30 units of elastase, filtered through 0.22 micron membrane and lyophilized. Source: Clostridium histolyticum Activity: ≥20,000 units collagense/30 units elastase per vial Collagenase: ≥125 units/mg dry weight Collagenase: ≥ 20,000 units/vial Caseinase: ≥ 200 units/mg dry weight Clostripain: ≤ 4.0 units/mg dry weight Tryptic: ≤ 0.5 units/mg dry weight Colony Count: ≤1 cfu/ml Elastase: ≥ 230 units/vial Country of Origin: All products from animal sources are produced from starting material of USDA-approved origin, collected in United States Department of Agriculture (USDA) or equivalent approved facilities, inspected to be free of disease and suitable for exportation.