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Base-pairing properties of Fm7dG and dCTP* in the replicating base pair site of polη. (A) Watson–Crick base pairing of Fm7dG:dCTP*. The interbase hydrogen bonds are indicated with dotted lines. The λ angles and C1′–C1′ distance for Fm7dG:dCTP* are shown. (B) Side view of Fm7dG:dCTP* with a coplanar base pair conformation.
