1PUF:
reference: Structure of HoxA9 and Pbx1 bound to DNA: Hox hexapeptide and DNA recognition anterior to posterior., LaRonde-LeBlanc NA, Wolberger C, Genes Dev 2003 Aug 15;17(16):2060-72. PMID: 12923056

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