1EFO:
reference: Crystal structure of an adenine bulge in the RNA chain of a DNA.RNA hybrid, d(CTCCTCTTC).r(gaagagagag)., Sudarsanakumar C, Xiong Y, Sundaralingam M, J Mol Biol 2000 May 26;299(1):103-12. PMID: 10860725

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