Lyophilized. PROTECT FROM MOISTURE. Native pepsin from porcine stomach mucosa. Secreted by the mucosal lining of the stomach. Active under acidic conditions. Catalyzes the hydrolysis of aminoacyl-proline to an amino acid and proline. Inhibitors include aliphatic alcohols, pepstatin A, and pH >6.0. Specific activity: ≥2000 units/mg protein. One unit is defined as the amount of enzyme that will digest hemoglobin substrates to TCA-soluble products, measured as a change in absorbance at 280 nm of 0.001 per min at 37°C, pH 2.0. pH optimum 2.0 - 4.0. EC 3.4.23.1, RTECS SC6132000, CAS 9001-75-6.

Merck Index: 14, 7146
Ref.: Bergmeyer, H.V. 1984. Methods of Enzymatic Analysis (3rd ed., vol. 5) p. 232, Academic Press, New York.
R: 36/37/38-42; S: 22-24-26-36/37