enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Upstream and downstream (DNA) - Wikipedia

    en.wikipedia.org/wiki/Upstream_and_downstream_(DNA)

    This means the upstream and downstream areas of the molecule may change depending on which gene is used as the reference. The terms upstream and downstream are sometimes also applied to a polypeptide sequence, where upstream refers to a region N-terminal and downstream to residues C-terminal of a reference point.

  3. Promoter (genetics) - Wikipedia

    en.wikipedia.org/wiki/Promoter_(genetics)

    In genetics, a promoter is a sequence of DNA to which proteins bind to initiate transcription of a single RNA transcript from the DNA downstream of the promoter. The RNA transcript may encode a protein , or can have a function in and of itself, such as tRNA or rRNA.

  4. TATA box - Wikipedia

    en.wikipedia.org/wiki/TATA_box

    In eukaryotes, the TATA box is located 25 base pairs upstream of the start site that Rpb4/Rbp7 use to initiate transcription. In metazoans, the TATA box is located 30 base pairs upstream of the transcription start site. [5] While in yeast, S. cerevisiae, the TATA box has a variable position which can range from 40 to 100 bp upstream of the ...

  5. Eukaryotic transcription - Wikipedia

    en.wikipedia.org/wiki/Eukaryotic_transcription

    Eukaryotic genes have acquired extensive regulatory sequences that encompass a large number of regulator-binding sites and spread overall kilobases (sometimes hundreds of kilobases) from the promoter–-both upstream and downstream. [1] The regulator binding sites are often clustered together into units called enhancers.

  6. Upstream and downstream (transduction) - Wikipedia

    en.wikipedia.org/wiki/Upstream_and_downstream...

    Upstream extracellular signaling transduce a variety of intracellular cascades. [1] Receptors and ligands are common upstream signaling molecules that dictate the downstream elements of the signal pathway. A plethora of different factors affect which ligands bind to which receptors and the downstream cellular response that they initiate.

  7. Upstream and downstream - Wikipedia

    en.wikipedia.org/wiki/Upstream_and_downstream

    Upstream and downstream (DNA), determining relative positions on DNA; Upstream and downstream (transduction) determining temporal and mechanistic order of cellular and molecular events of signal transduction

  8. Directionality (molecular biology) - Wikipedia

    en.wikipedia.org/wiki/Directionality_(molecular...

    The relative positions of structures along strands of nucleic acid, including genes and various protein binding sites, are usually noted as being either upstream (towards the 5′-end) or downstream (towards the 3′-end). (See also upstream and downstream.) Directionality is related to, but different from, sense.

  9. Group I catalytic intron - Wikipedia

    en.wikipedia.org/wiki/Group_I_catalytic_intron

    Splicing of group I introns is processed by two sequential transesterification reactions. [3] First an exogenous guanosine or guanosine nucleotide (exoG) docks onto the active G-binding site located in P7, and then its 3'-OH is aligned to attack the phosphodiester bond at the "upstream" (closer to the 5' end) splice site located in P1, resulting in a free 3'-OH group at the upstream exon and ...