Isolated from S. aureus, strain V8, this protease exhibits cleavage of peptide bonds on the COOH-terminal side of either aspartate or glutamate residues.Unit Definition: One unit will hydrolyze casein to change A280 0.001 per minute, pH 7.8, at 37<144>C. LyophilizedActivity: Approx. 500 units/mg Ref.: 1. Drapeau, G.A.,Boily, Y., Houmard, J., Biol. Chem., 217: 6720 (1972). 2. Kunitz,M., J. Gen. Physiol., 30: 291 (1947).