Figure 7From: Structure-function relationships of wheat flavone O-methyltransferase: Homology modeling and site-directed mutagenesisHypothetical mechanism for methylation of selgin by TaOMT2. In contrast with 3'-methylation, electron transfer for methylation of the 5'-hydroxyl group proceeds from water molecules within the reaction centre to the imidazole ring of His262, and further to Asp263 giving rise to tricin.Back to article page