The process of transcription elongation by RNA polymerase II (Pol II), in which Pol II travels along DNA and synthesizes RNA from DNA, is essential for proper gene expression in all eukaryotic cells.

Thus, it is RNA pol II that transcribes the messenger RNAs, which serve as the templates for production of protein molecules. The first step in transcription is initiation, when the RNA pol binds ...

The Pre-Initiation Complex (PIC), which consists of Mediator, TFIIA, TFIIB, TFIID, TFIIE, TFIIF, TFIIH, and RNA polymerase II (pol II), governs the expression of all protein-coding and most non-coding ...