3.4.22.51	-	638875, 696760	
3.4.22.51	bound to benzoyl-Arg-Ala-fluoromethyl ketone and benzoyl-Tyr-Ala-fluoromethyl ketone, hanging drop vapor diffusion method	638882	
3.4.22.51	complexed with benzyloxycarbonyl-Phe-Ala-fluoromethylketone	638886	
3.4.22.51	cruzain crystals diffract to 1.2 A resolution, yielding two novel cruzain structures: apocruzain and cruzain bound to the reversible covalent inhibitor S-methyl thiomethanesulfonate. Mass-spectrometric experiments confirm the presence of a methylthiol group attached to the catalytic cysteine	752406	
3.4.22.51	enzyme lacking the C-terminal domain, complexed with benzyloxycarbonyl-Phe-Ala-fluoromethylketone	638879	
3.4.22.51	recombinant protein and truncated version	638881