4IHX:
reference: Control of DNA minor groove width and Fis protein binding by the purine 2-amino group., Hancock SP, Ghane T, Cascio D, Rohs R, Di Felice R, Johnson RC, Nucleic Acids Res. 2013 May 9. PMID: 23661683

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