RNA pol II & TFIIB (yeast)
Shows intrusion of TFIIB into interior of the enzyme.
Citation:
Protein Database file 1R5U
Structural basis of transcription: an RNA polymerase II-TFIIB cocrystal at 4.5 Angstroms.
Bushnell, D.A., Westover, K.D., Davis, R.E., Kornberg, R.D.
(2004) Science 303: 983-988