1YUI:
reference: The solution structure of a specific GAGA factor-DNA complex reveals a modular binding mode., Omichinski JG, Pedone PV, Felsenfeld G, Gronenborn AM, Clore GM, Nat Struct Biol 1997 Feb;4(2):122-32. PMID: 9033593

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