both endopeptidase and exopeptidase activities were investigated using gelatin and l-amino acid-4-nitroanilides ( benzoyl-l-arginine-4-nitroanilide/bapa , glutaryl-l-phenyl-alanine-4-nitroanilide/gluphepa , alanine-4-nitro-anilide/apa , leucine-4-nitroanilide/lpa , and benzoyl-l-tyrosine-4-nitroanilide/btpa ) as substrates .
C0002520
amino acid
C0001898
alanine