1D3U:
reference: The structural basis for the oriented assembly of a TBP/TFB/promoter complex., Littlefield O, Korkhin Y, Sigler PB, Proc Natl Acad Sci U S A 1999 Nov 23;96(24):13668-73. PMID: 10570130

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