3IKL: Crystal Structure Of Pol Gb Delta-I4.
reference: Structural insight into processive human mitochondrial DNA synthesis and disease-related polymerase mutations., Lee YS, Kennedy WD, Yin YW, Cell. 2009 Oct 16;139(2):312-24. PMID: 19837034

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