assays of substrate selectivity , relative substrate affinity , ph and anion and cation sensitivity indicated the activity to be distinct from dipeptidyl aminopeptidases i ( chloride-dependent hydrolysis of pro-phe- , gly-phe- , gly-arg- , and pro-arg-na 's at acid ph ) , ii ( lys-ala-na hydrolysis ) , iii ( arg-arg-na hydrolysis ) , and iv ( gly-pro-na hydrolysis ) .
C0003075
anion
C0008203
chloride