1VRL:
reference: Structural basis for removal of adenine mispaired with 8-oxoguanine by MutY adenine DNA glycosylase., Fromme JC, Banerjee A, Huang SJ, Verdine GL, Nature 2004 Feb 12;427(6975):652-6. PMID: 14961129

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