3.4.23.18 additional information - pI: 3.15 and 3.5 (isozyme A1) 30569 3.4.23.18 additional information - pI: 3.65 30564 3.4.23.18 additional information - pI: 3.9 30560 3.4.23.18 additional information - pI: 3.9 (isozyme A2) 30569 3.4.23.18 2 - - 754494 3.4.23.18 2.2 - pH optimum for milk protein hydrolysis 755227 3.4.23.18 2.3 - hemoglobin 30558 3.4.23.18 2.5 - - 753450 3.4.23.18 2.5 3 substrate milk casein 668812 3.4.23.18 2.7 - assay at 668812