2K1Y:
reference: Solution structure of duplex DNA containing the mutagenic lesion 1,N(2)-etheno-2'-deoxyguanine., Zaliznyak T, Lukin M, Johnson F, de los Santos C, Biochemistry. 2008 Apr 22;47(16):4606-13. Epub 2008 Mar 29. PMID: 18373352

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