Fig. 2: Reaction pathways, substrates, products, and inhibitors associated with the AHAS-catalyzed reaction.
From: Structural basis of resistance to herbicides that target acetohydroxyacid synthase

a Scheme representing the catalytic reaction of AHAS and its inhibition by soluble quinones and herbicides. b Chemical structures of the seven herbicides from four different classes studied here. SUs (chlorimuron ethyl (CE) and amidosulfuron (AS)), TPS (metosulam (MT) and penoxsulam (PS)), PYBs (bispyribac (BS) and pyrithiobac (PB) and IMIs (imazaquin (IQ)). FADox = oxidized FAD. FADred = FAD reduced. FADrad = FAD semi-reduced. HE-ThDP = hydroxyethyl thiamine diphosphate.