3.5.1.121	native enzyme 11515fold to homogeneity from liver by anion exchange chromatography, ammonium sulfate fractionation, gel filtration, and another step of anion exchange chromatgraphy, follwed by chromatofocusing and again gel filtration	
3.5.1.121	recombinant tagged wild-type and mutant enzymes from Escherichia coli strain BL21(DE3) by affinity cromatography and ultrafiltration, method improvement