1.4.9.2	-	396589, 396591, 396592, 685188, 687589	
1.4.9.2	61fold to homogeneity, multistep procedure	655062	
1.4.9.2	recombinant enzyme, expression in Paracoccus denitrificans	673559	
1.4.9.2	Sephacryl S-200 gel filtration	685206