The actinobacterial transcription factor RbpA binds to the principal sigma subunit of RNA polymerase - Tabib-Salazar, A; Liu, B; Doughty, P; Lewis, RA; Ghosh, S; Parsy, M-L; Simpson, PJ; O'Dwyer, K; Matthews, SJ; Paget, MS (NUCLEIC ACIDS RESEARCH, 2013)