In order for transcription to begin in bacteria, a protein called a sigma factor (also known as a specificity factor) is required. It is a bacterial transcription initiation factor that permits RNA polymerase (RNAP) to specifically bind to gene promoters. It shares homology with the eukaryotic factor TFIIB and the archaeal transcription factor B.
What is RNA?
An intermediary enzyme called ribonucleic acid (RNA) polymerase is in charge of converting gene sequences into RNA-based genetic material that may be used for protein synthesis.
