scytalidium lignicolum acid protease b , a pepstatin-insensitive acid protease , was modified by 1,2-epoxy-3- ( p-nitrophenoxy ) propane ( epnp ) with the concomitant loss of its enzyme activity , and an epnp-labeled peptide was isolated from the thermolysin-digest of the modified enzyme by hplc .
C0030946
protease
C0014442
enzyme