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Structural comparison between Dpo4-catalyzed bypass of N2-NaphG and human pol κ. A, superimposition of the Npg-1 complex (cyan) and the human pol κ ternary complex (purple; pdb ID code 2oh2; r.m.s.d. = 5.35). B, the active site DNA residues from the Npg-1 complex (cyan) are shown along with the superimposed pol κ structure (purple, space-filling). Hydrophobic and/or aromatic residues near the naphthyl moiety are highlighted for both enzymes.
