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Proposed interactions between a formyl functional group of FapydG and 3′-neighbouring nucleobases (schematic generated from their time-averaged structures). (a) FapydG/A and (b) FapydG/C base steps show hydrogen bond lengths at 2.35 and 2.09 Å, and the angles at 152 and 154°, respectively. (c) FapydG/G shows opportunities for bridging water molecules while (d) FapydG/T indicates unfavourable steric interactions between the formamido group and the methyl group of thymine.
