4.2.2.19	purification based on affinity chromatography	
4.2.2.19	recombinant enzyme comprising residues 25-506 overexpressed in Flavobacterium heparinum cells, to homogeneity	
4.2.2.19	recombinant His-tagged enzyme from Escherichia coli, His-tag is removed, purified to homogeneity, 69fold	
4.2.2.19	to homogeneity