1BGF:
reference: Structure of the amino-terminal protein interaction domain of STAT-4., Vinkemeier U, Moarefi I, Darnell JE Jr, Kuriyan J, Science 1998 Feb 13;279(5353):1048-52. PMID: 9461439

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