APROTININ, 250 mg, Lyophilized Powder. Trypsin inhibitor, pancreatic alkaline. Aprotinin is a multiple inhibitor of many serine proteases, including Trypsin, Plasmin, Urokinase, Kallikrein, Factor XIIa, etc. It contains 58 amino acids. It forms stable complexes with these enzymes. Aprotinin can be used in any application where inhibition of its targeted proteases is needed. Current uses include protein isolation, removal of reactive proteases through solid phase, inhibition of undesired proteolytic activity in laboratory assays, or other techniques; for blocking fibrinolytic activity in vitro; etc. Aprotinin can be used for the determination of targeted proteases inhibition, laboratory assays and techniques, protein purification, etc. It can be restored with 5mL distilled water for obtaining a solution at about 50 mg/mL. Stable at 2-8℃ up to the expiration date printed on the label; up to 6 months stored at below -20℃.