In bacteria, all transcription is performed by a single type of RNA polymerase. This polymerase contains four catalytic subunits and a single regulatory subunit known as sigma (s). Interestingly ...

which are recognized by the sigma factor subunit of RNA polymerase. In eukaryotes, promoter regions are more complex and often include a TATA box, a CAAT box, and GC-rich sequences. Eukaryotic ...

Gene expression is linked to RNA transcription, which cannot happen without RNA polymerase. However, this is where the similarities between prokaryote and eukaryote expression end. Central to the ...