1OSL:
reference: Structure and flexibility adaptation in nonspecific and specific protein-DNA complexes., Kalodimos CG, Biris N, Bonvin AM, Levandoski MM, Guennuegues M, Boelens R, Kaptein R, Science. 2004 Jul 16;305(5682):386-9. PMID: 15256668

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