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Proliferating cell nuclear antigen (PCNA) acts as a sliding clamp to support DNA replication and repair. The structure of PCNA from Leishmania donovani (LdPCNA) has been determined at 2.73Å resolution. Structure consists of six crystallographically independent molecules which form two trimeric rings. The pore diameter of the individual trimeric ring is of the order of 37Å. The two rings are stacked...
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