1.7.3.3 additional information no cofactors 394150, 394180 1.7.3.3 additional information the catalytic mechanism of UOX does not imply any cofactor 696770 1.7.3.3 additional information the enzyme is cofactor-free 764897 1.7.3.3 additional information UOX is unique among the oxygen-requiring enzymes in the sense that it does not need a cofactor to convert uric acid to 5-hydroxyisourate 695394