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3 Μαρ 2021 · Gene activation The process of activation of a gene so that it is expressed at a particular time. This process is crucial in growth and development.
Gene activation is the process by which a gene is turned on and begins to produce its corresponding RNA and protein products. This process is essential for cellular functions and development, as it allows cells to respond to environmental signals and changes, influencing cell behavior and identity.
20 Δεκ 2023 · Some examples of direct gene activation include the activation of genes involved in immune response when the body encounters a pathogen, the activation of genes involved in muscle growth during exercise, and the activation of genes involved in cell repair after an injury.
Definition. Gene activation is the process by which a gene's expression is initiated, leading to the production of RNA and ultimately proteins. This process is critical for regulating biological functions, allowing cells to respond to environmental cues and developmental signals.
The lac operon of E. coli contains genes involved in lactose metabolism. It's expressed only when lactose is present and glucose is absent. Two regulators turn the operon "on" and "off" in response to lactose and glucose levels: the lac repressor and catabolite activator protein (CAP).
Steroid hormones (like testosterone and estrogen) regulate gene expression. In the previous tutorials in this unit, our discussion of hormones and signaling pathways focused on activating dormant enzymes in the cytoplasm.
Direct Gene Activation. Receptors that can directly influence gene expression are termed nuclear receptors. Located within the cytosol or nucleus, nuclear receptors are the target of steroid and thyroid hormones that are able to pass through the cell membrane.
