1D81:
reference: The conformational variability of an adenosine.inosine base-pair in a synthetic DNA dodecamer., Leonard GA, Booth ED, Hunter WN, Brown T, Nucleic Acids Res 1992 Sep 25;20(18):4753-9. PMID: 1408788

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