1N53:
reference: Solution structure of the Bacillus subtilis T-box antiterminator RNA: seven nucleotide bulge characterized by stacking and flexibility., Gerdeman MS, Henkin TM, Hines JV, J Mol Biol 2003 Feb 7;326(1):189-201. PMID: 12547201

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