1N96:
reference: Four-stranded DNA structure stabilized by a novel G:C:A:T tetrad., Escaja N, Gelpi JL, Orozco M, Rico M, Pedroso E, Gonzalez C, J Am Chem Soc. 2003 May 14;125(19):5654-62. PMID: 12733903

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