3.4.21.103	azocasein + H2O	-	Physarum flavicomum	?	-	?	15347	
3.4.21.103	bovine albumin + H2O	-	Dictyostelium discoideum	?	-	?	362010	
3.4.21.103	casein + H2O	-	Dictyostelium discoideum	?	-	?	15445	
3.4.21.103	Cytochrome c + H2O	-	Dictyostelium discoideum	?	-	?	16271	
3.4.21.103	Glucagon + H2O	-	Physarum polycephalum	?	-	?	15578	
3.4.21.103	Hemoglobin + H2O	-	Physarum polycephalum	?	-	?	15450	
3.4.21.103	Hemoglobin + H2O	-	Dictyostelium discoideum	Hydrolyzed hemoglobin	-	?	15477	
3.4.21.103	Hemoglobin + H2O	-	Physarum polycephalum	Hydrolyzed hemoglobin	-	?	15477	
3.4.21.103	Hemoglobin + H2O	-	Physarum flavicomum	Hydrolyzed hemoglobin	-	?	15477	
3.4.21.103	hide powder azure + H2O	-	Dictyostelium discoideum	?	-	?	15924	
3.4.21.103	histone + H2O	-	Dictyostelium discoideum	?	-	?	73504	
3.4.21.103	insulin B chain + H2O	-	Physarum polycephalum	?	-	?	37184	
3.4.21.103	KPIEFF(NO2)RL + H2O	-	Physarum polycephalum	?	-	?	365148	
3.4.21.103	Lys-Pro-Ile-Glu-Phe-(4-nitro)Phe-Arg-Leu + H2O	-	Physarum polycephalum	Lys-Pro-Ile-Glu-Phe + (4-nitro)Phe-Arg-Leu	-	?	16473	
3.4.21.103	Lys-Pro-Ile-Glu-Phe-(4-nitrophenyl)Arg-Leu + H2O	-	Physarum polycephalum	Lys-Pro-Ile-Glu-Phe + (4-nitrophenyl)Arg-Leu	-	?	382225	
3.4.21.103	additional information	activates trypsinogen	Dictyostelium discoideum	?	-	?	89	
3.4.21.103	additional information	derivatives of basic amino acids and related peptides (proteinase E)	Physarum polycephalum	?	-	?	89	
3.4.21.103	additional information	not: N-acetyl-N-phenylalanyl-3,5-diiodo-L-tyrosine	Physarum polycephalum	?	-	?	89	
3.4.21.103	additional information	no hydrolysis of hemoglobin, casein, azocoll and Ala-Ala-Phe-7-amido-4-methylcoumarin	Physarum polycephalum	?	-	?	89	
3.4.21.103	additional information	involved in general protein degradation within the lysosomes of Dictyostelium discoideum	Dictyostelium discoideum	?	-	?	89	
3.4.21.103	additional information	in the combinatorial chromogenic peptide Lys-Pro-X-Glu-P1*Nph-X-Leu, the enzyme prefers specifically Nle (100%), Asp (86%), Leu (84%), Glu (78%), and Ala (66%) in decreasing order of relative activity at the P1 position and the rate varies over 100fold between the most preferred Nle (100%) and the least preferred Pro (0.7%)	Physarum polycephalum	?	-	?	89	
3.4.21.103	additional information	small hydrophobic residues are preferred at the P1' position, Ile for the P3 position and/or Gln in the P2' position are not optimal for the enzyme	Physarum polycephalum	?	-	?	89	
3.4.21.103	ovalbumin + H2O	-	Dictyostelium discoideum	?	-	?	37064	
3.4.21.103	oxidized insulin B + H2O	-	Physarum polycephalum	?	-	?	95034	
3.4.21.103	oxidized insulin B chain + H2O	the major cleavage sites are Gly8-Ser9, Leu11-Val12, Cys19-Gly20, Gly20-Glu21, and Phe24-Phe25	Physarum polycephalum	?	-	?	37092	
3.4.21.103	Oxidized insulin B-chain + H2O	major cleavage sites: Gly8-Ser9 (most susceptible), Leu11-Val12, Cysteic acid19-Gly20 and Phe24-Phe25	Physarum polycephalum	Hydrolyzed insulin B-chain	-	?	15315	
3.4.21.103	Substance P + H2O	-	Physarum polycephalum	?	-	?	17205