Original: Bushnell, D.A., Westover, K.D., Davis, R.E. and Kornberg, R.D. (/O2004/O) Structural basis of transcription: An RNA polymerase II - TFIIB cocrystal at 4.5 angstroms.
Simplified: Structural basis of transcription: an RNA polymerase II - TFIIB cocrystal at 4.5 angstroms.