3AUO:
reference: The structural basis of the kinetic mechanism of a gap-filling X-family DNA polymerase that binds Mg(2+)-dNTP before binding to DNA., Nakane S, Ishikawa H, Nakagawa N, Kuramitsu S, Masui R, J Mol Biol. 2012 Mar 30;417(3):179-96. Epub 2012 Jan 27. PMID: 22306405

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