1TFB:
reference: Human general transcription factor TFIIB: conformational variability and interaction with VP16 activation domain., Hayashi F, Ishima R, Liu D, Tong KI, Kim S, Reinberg D, Bagby S, Ikura M, Biochemistry 1998 Jun 2;37(22):7941-51. PMID: 9609687

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