Notes on RNA polymerase:
RplK (L11, RelC): 50S ribosomal subunit protein L11
RpoB: Beta subunit of RNA polymerase.
RpoS: Sigma subunit of RNA polymerase. Alternative (stress-induced) sigma factor.
X-ray crystal structure of Escherichia coli RNA polymerase σ70 holoenzyme: http://www.ncbi.nlm.nih.gov/pubmed/23389035
Tuning promoter strength through RNA polymerase binding site design in Escherichia col: http://recentlyapp.com/paper/23271961
Functional modulation of Escherichia coli RNA polymerase.: http://www.ncbi.nlm.nih.gov/pubmed/11018136/