Fig. 4

Structures of DNA lesions and possible recognition site of Nfi. a Structures of oxanine and the possible open- or closed-ring structure of Oz. Red circle indicates the common moiety that Nfi may recognize. b Structures of uracil, thymine and Gh. Red circle indicates the common moiety that Nfi may recognize. Blue circle indicates the moiety protruding from the six- or five-membered ring, and Nfi may disfavor these moieties