4.2.1.49	NAD+	-	
4.2.1.49	NAD+	full enzyme activity requires NAD+ in both subunits	
4.2.1.49	NAD+	tightly enzyme-bound	
4.2.1.49	NAD+	tightly bound cofactor	
4.2.1.49	NAD+	each monomer of urocanase contains one molecule of tightly bound NAD+, which is required for its activity