Description_x000D_ Packaging_x000D_ 25 mg in poly bottle_x000D_ 5, 10 mg in glass bottle_x000D_ Package size based on protein content_x000D_ Biochem/physiol Actions_x000D_ Broad-spectrum inhibitor of carboxypeptidases of animal digestive-tract origin, but little or no activity against plant and microbial carboxypeptidases. However, recent results suggest it may play a part in resistance to microbial pathogens by preventing digestion of protein._x000D_ Unit Definition_x000D_ One μg of inhibitor protein will inhibit the activity of ≥3 μg of carboxypeptidase A by 50% using hippuryl-L-phenylalanine as substrate at pH 7.5 at 25°C._x000D_ Physical form_x000D_ Lyophilized powder containing traces of sodium citrate and sodium chloride; balance primarily non-protein components.