1.2.1.85	ammonium sulfate fractionation, TSKgel DEAE-5PW column chromatography, Affigel-Blue affinity chromatography, and TSKgel Phenyl-5PW column chromatography	
1.2.1.85	recombinant soluble N-terminally His6-tagged enzyme from Escherichia coli by nickel affinity chromatography, tag cleavage by TEV protease, and another nickel affinity chromatography step, followed by gel filtration and ultrafiltration	
1.2.1.85	streptomycin sulfate precipitation, ammonium sulfate precipitation, DE52 cellulose column chromatography, DEAE-cellulofine column chromatography, and DEAE-Toyopearl column chromatography