2LIA:
reference: Site-Specific Stabilization of DNA by a Tethered Major Groove Amine, 7-Aminomethyl-7-deaza-2'-deoxyguanosine., Szulik MW, Voehler MW, Ganguly M, Gold B, Stone MP, Biochemistry. 2013 Oct 16. PMID: 24131376

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