1AQN:
reference: Escherichia coli initiation factor 3 protein binding to 30S ribosomal subunits alters the accessibility of nucleotides within the conserved central region of 16S rRNA., Muralikrishna P, Wickstrom E, Biochemistry 1989 Sep 19;28(19):7505-10. PMID: 2514787

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