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Transcription explained by Paul Anderson

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Transcription explained by Paul Anderson

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An interactive for learning about operons

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An interactive for learning about operons

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Build a gene network! The lac operon is a set of genes which are responsible for the metabolism of lactose in some bacterial cells. Explore the effects of mutations within the lac operon by adding or removing genes from the DNA.

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Repressible operons are operons that have repressor molecules that bind to operators, however this alone does not stop RNA transcription. A corepressor is bound to the repressor, which is enough to inhibit transcription. This system is used in anabolic reactions, like regulating the amount of enzymes made that make the protein Tryptophan.

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Inducible operons are operons that will not allow RNA transcription with the operator-repressor complex alone. However, with a bound molecule to the repressor called the 'inducer', RNA transcription can proceed. This helps in catabolic reactions by making enzymes that break down molecules like lactose.

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Tryptophan in a Repressible Operon system

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Tryptophan in a Repressible Operon system