the proteinase is characterized by a broad substrate specificity , optimal activity at 35 to 40 degrees c ( ph 8.0 ) in the presence of human collagen , elastin , or hemoglobin , an isoelectric point of ph 4.5 , and inhibition by organofluorides , n-tosyl-l-phenylalanine chloromethyl ketone , chymostatin , and alpha-1-antitrypsin .
C0086418
human
C0013765
elastin