RNA polymerase - Wikipedia, the free encyclopedia
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RNA polymerase ( RNAP or RNApol ) is an enzyme that produces RNA. In cells, RNAP is needed for constructing RNA chains from DNA genes as templates, a process called transcription. RNA polymerase ...
en.wikipedia.org/wiki/RNA_polymerase
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For a long time, E. coli was thought to contain just a single RNA polymerase. We now know that, although it has one major or principal RNA polymerase, it also contains (at least) six minor forms that are required or are used in special circumstances.
www.mun.ca/biochem/courses/3107/Lectures/Topics/RNAP_ba... www.mun.ca/biochem/courses/3107/Lectures/Topics/RNAP_bacterial.html
An enzyme, an RNA polymerase, binds to the complex of transcription factors. ... In eukaryotes, this requires — at least for protein-encoding genes — that the nucleosomes in front of the advancing RNA polymerase (RNAP II) be removed. A complex of proteins is responsible for this. The same complex replaces the...
users.rcn.com/jkimball.ma.ultranet/BiologyPages/T/Trans... users.rcn.com/jkimball.ma.ultranet/BiologyPages/T/Transcription.html
RNA polymerase I - Wikipedia, the free encyclopedia
RNA polymerase I (also called Pol I ) is, in eukaryotes, the only enzyme that transcribes ribosomal RNA (excluding 5S rRNA, which is synthesized by RNA Polymerase III) a type of RNA which accounts ...
en.wikipedia.org/wiki/RNA_polymerase_I
An enzyme that catalyzes the synthesis of an RNA strand from a DNA template. The enzyme that polymerizes RNA by using DNA as a template. It can also act as a primase initiating DNA replication. (Also known as transcriptase or RNA transcriptase).
www.biochem.northwestern.edu/holmgren/Glossary/Definiti... www.biochem.northwestern.edu/holmgren/Glossary/Definitions/Def-R/RNA_polymerase.html
To begin transcription, eucaryotic RNA polymerase II requires the general transcription factors. These transcription factors are called TFIIA, TFIIB, and so on. (A) The promoter contains a DNA sequence called the TATA box, which is located 25 nucleotides away from the site where transcription is initiated.
www.accessexcellence.org/AB/GG/RNA_trans.html www.accessexcellence.org/AB/GG/RNA_trans.html
An E. coli RNA polymerase is composed of five subunits: two a subunits, and one for each b, b', and s subunit. ... RNA polymerase II is involved in the transcription of all protein genes and most snRNA genes. It is undoubtedly the most important among the three classes of RNA polymerases. The other two classes transcribe...
www.web-books.com/MoBio/Free/Ch4B1.htm
RNA Polymerase transcribes genetic information into a message that can be read by the ribosome to produce protein. ... "If any enzyme does the cell's heavy lifting, it's RNA polymerase II. Its job: getting the synthesis of all the proteins in higher cells under way by copying their genes into RNAs, and doing it at just...
www-ssrl.slac.stanford.edu/research/highlights_archive/... www-ssrl.slac.stanford.edu/research/highlights_archive/RNA_Polymerase.html
3D structures of the RNA polymerase, transcript cleavage factor GreA, simga-70 fragment ... Transcription elongation factors stimulate the activity of the RNA polymerase by increasing the overall elongation rate and the completion of RNA chains. E. coli GreA is one such factor. It acts by inducing cleavage of the...
www.rockefeller.edu/labheads/darst/structures.htm
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