4YD1:
reference: Creative template-dependent synthesis by human polymerase mu., Moon AF, Gosavi RA, Kunkel TA, Pedersen LC, Bebenek K, Proc Natl Acad Sci U S A. 2015 Aug 18;112(33):E4530-6. doi:, 10.1073/pnas.1505798112. Epub 2015 Aug 3. PMID: 26240373

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