The production of ribosomes begins when RNA polymerase I (Pol I) synthesizes pre-rRNA, a precursor transcript of the mature ...

The process of transcription can be visualized by electron microscopy (Figure 1); in fact ... In eukaryotes, RNA pol I transcribes the genes that encode most of the ribosomal RNAs (rRNAs ...

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.

and RNA polymerase II (pol II), governs the expression of all protein-coding and most non-coding RNA genes in the human genome and is approximately 4.0 MDa in size. Mediator and TFIID, each ...

For eukaryotic Pol II, 'correct' initiation events lead to discrete RNA species, most of which are ... level of a given gene in individual cells 1. As surprisingly high proportions of eukaryotic ...