Following incubation, activity was assayed spectrophotometrically by {HEAD ~ cleavage} of {TAIL ~ the dipeptide substrate} FAGLA  
of
Following incubation , activity was assayed spectrophotometrically by { HEAD ~ cleavage } of { TAIL ~ the dipeptide substrate } FAGLA
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH