3.4.21.78	7.5	8.5	D-Pro-Phe-Arg 4-nitroanilide, mouse enzyme	
3.4.21.78	7.5	-	assay at	
3.4.21.78	8	-	Gly-Pro-Arg 4-methylcoumarin 7-amide, human enzyme	
3.4.21.78	8	8.5	D-Pro-Phe-Arg 4-nitroanilide	
3.4.21.78	11	-	tosyl-Gly-Pro-Arg 4-nitroanilide, human enzyme