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An open ring model of PfuPCNA trimer based on structural comparisons between wild-type and mutant PfuPCNA crystals. A ring structure model was built by superposing the monomer structure of D143A/D147A on the intermolecular interfaces of the wild-type structure. Two orthogonal views (a top view, left, and a side view, right) are shown. Three subunits are indicated by different colors.
