1.7.1.13	7-formyl-7-deazaguanine	carbonyl analogue of the imine intermediate, recognized by QueF as weak ligand for binding but not as substrate for reduction or oxidation	220840	
1.7.1.13	EDTA	0.1 mM, 89% residual activity	21	
1.7.1.13	peroxide	peroxide-induced inactivation of the wild-type enzyme is reversible with thioredoxin	179544