Fig. 1: Cryo-EM structure of the DNA-bound PolD–PCNA processive complex.
From: Structural basis for the increased processivity of D-family DNA polymerases in complex with PCNA

a Two orthogonal views of the cryo-EM density map (left) and cartoon representations (right) of the DNA-bound PolD–PCNA complex. b Orientation of the DNA duplex with respect to the PCNA threefold symmetry axis. c Cutaway front view of the PolD–PCNA–DNA complex showing the electrostatic surface potential with negative, neutral, and positive charges represented in red, white, and blue, respectively.