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Activator may refer to: Activator (genetics), a DNA-binding protein that regulates one or more genes by increasing the rate of transcription; Activator (phosphor), a type of dopant used in phosphors and scintillators; Enzyme activator, a type of effector that increases the rate of enzyme mediated reactions
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 Activator Method Chiropractic Technique is a chiropractic treatment method that uses a device created by Arlan Fuhr as an alternative to manual manipulation of the spine or extremity joints. The device is categorized as a mechanical force manual assisted (MFMA) instrument which is generally regarded as a softer chiropractic treatment ...
Activator protein 1 (AP-1) is a transcription factor that regulates gene expression in response to a variety of stimuli, including cytokines, growth factors, stress, and bacterial and viral infections. [1] AP-1 controls a number of cellular processes including differentiation, proliferation, and apoptosis. [2]
Hexokinase-I (HK-I) is an enzyme activator because it draws glucose into the glycolysis pathway. Its function is to phosphorylate glucose releasing glucose-6-phosphate (G6P) as the product. HK-I not only signals the activation of glucose into glycolysis but also maintains a low glucose concentration to facilitate glucose diffusion into the cell.
The activator bound coactivator recruits RNA polymerase and other transcription machinery that then begins transcribing the target gene. A coactivator is a type of transcriptional coregulator that binds to an activator (a transcription factor ) to increase the rate of transcription of a gene or set of genes. [ 1 ]
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In phosphors and scintillators, the activator is the element added as dopant to the crystal of the material to create desired type of nonhomogeneities. In luminescence , only a small fraction of atoms, called emission centers or luminescence centers , emit light.