Gene Regulation

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10 Terms

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DNA binding proteins

repressors for gene regulation that block RNA polymerase

2
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lac operon

bacterial genes expressed to convert lactose into energy

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lacX

converts lactose → glucose + galactose

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lacY

allows lactose into the cell

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lacZ

acetylates sugar analogs

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when lactose is not present (no glucose)

repressor is bound to operator

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when lactose is present (no glucose)

allolactose conversion occurs and repressor is unbound from operator

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activator

activate transcription by recruiting RNA polymerase to the promotor

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when glucose levels are low

activator is turned on

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when glucose levels are high

activator is turned off