1.4.4.2	-	391978, 391979, 391980, 391984, 391990, 391993, 391994, 391996, 654089, 686720	
1.4.4.2	H1, H2, and L protein purified to homogeneity, more than 95% pure	673411	
1.4.4.2	Ni-NTA column chromatography	724197	
1.4.4.2	Q-Sepharose column chromatography and Sephacryl S-100 gel filtration	697916	
1.4.4.2	recombinant His-tagged enzyme from Escherichia coli by nickel affinity and ion exchange chromatography, and gel filtration	710748	
1.4.4.2	recombinant His6-tagged enzymes from Escherichia coli strain BL21(DE3) by nickel affinity chromatography and dialysis	741906	
1.4.4.2	ultracentrifugation	688637	
1.4.4.2	using a nickel-nitrilotriacetic acid-agarose column	673411