When are the genes involved in lactose metabolism in e. Coli expressed and when are they turned off?.

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08-11-2022
Biology

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When are the genes involved in lactose metabolism in e. Coli expressed and when are they turned off?.

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contexto1212 contexto1212 · Answer 1 · 2022-11-14T09:54:58-05:00

Genes involved in lactose metabolism are found in the lac operon of E. coli. It only expresses itself when lactose and glucose are both absent. For E. coli to metabolise lactose (milk sugar) for carbon and energy, the lactose operon must be expressed.

The lac repressor and catabolite activator protein are two regulators that control the operon ``on" and "off" states in response to lactose and glucose concentrations (CAP). The particular on/off switching of an organism's genes is made possible by the gene regulatory proteins. In order to control the patterns of gene expression that give each cell type its distinct properties, different choices of gene regulatory proteins are present in various cell types.

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