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A transcriptional activator is a protein (transcription factor) that increases transcription of a gene or set of genes. [1] Activators are considered to have positive control over gene expression, as they function to promote gene transcription and, in some cases, are required for the transcription of genes to occur.
The dCas9 activation system allows a desired gene or multiple genes in the same cell to be expressed. It is possible to study genes involved in a certain process using a genome wide screen that involves activating expression of genes. Examining which sgRNAs yield a phenotype suggests which genes are involved in a specific pathway.
Regulation of gene expression, or gene regulation, [1] includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products (protein or RNA). Sophisticated programs of gene expression are widely observed in biology, for example to trigger developmental pathways, respond to environmental ...
In contrast to RNAi, promoter-targeted saRNAs induce prolonged activation of gene expression associated with epigenetic changes. [15] It is currently suggested that saRNAs are first loaded and processed by an Ago protein to form an Ago-RNA complex which is then guided by the RNA to its promoter target.
The effect of β-aminoisobutyric acid in white fat includes the activation of thermogenic genes that prompt the browning of white adipose tissue and the consequent increase of background metabolism. Hence, the β-aminoisobutyric acid could act as a messenger molecule of PGC-1α and explain the effects of PGC-1α increase in other tissues such ...
Tissue-type plasminogen activator, short name tPA, is a protein that facilitates the breakdown of blood clots. It acts as an enzyme to convert plasminogen into its active form plasmin , the major enzyme responsible for clot breakdown.
All three TGFβ1, TGFβ2 and TGFβ3. are synthesized as precursor molecules containing a propeptide region in addition to the TGF-β homodimer. [10] After it is synthesized, the TGF-β homodimer interact with a Latency Associated Peptide (LAP)[a protein derived from the N-terminal region of the TGF beta gene product] forming a complex called Small Latent Complex (SLC).
The difference in brain size between humans and apes, for instance, has been linked to mutations in the gene Asb11, which is an upstream activator of SOX2 in the developing neural system. [20] Induced pluripotency is possible using adult neural stem cells, which express higher levels of Sox2 and c-Myc than embryonic stem cells.
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