9ICL:
reference: Characterization of the metal ion binding helix-hairpin-helix motifs in human DNA polymerase beta by X-ray structural analysis., Pelletier H, Sawaya MR, Biochemistry. 1996 Oct 1;35(39):12778-87. PMID: 8841120

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