4EBE:
reference: A nucleotide analogue induced gain of function corrects the error-prone nature of human DNA polymerase iota., Ketkar A, Zafar MK, Banerjee S, Marquez VE, Egli M, Eoff RL, J Am Chem Soc. 2012 May 26. PMID: 22632140

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).