like preparations obtained in the same way ( 600 x purified ) from peripheral blood leucocytes , it has a broad ph profile of activity ( ph 7 -- 10.5 ) and in this , as well as in substrate specificity and sensitivity to activators and inhibitors , it behaves as a serine-histidine type protease similar to elastase ( ec 3.4.21.11 ) .
C0036734
serine
C0030306
elastase