Credit: FRANCIS LEROY & MATHILDE VANSPEYBROUCK, BIOCOSMOS/SCIENCE PHOTO LIBRARY

Caption: Animation showing the repression of the tryptophan (trp) operon, the set of genes that code for the amino acid tryptophan in Escherichia coli bacteria. When there is a plentiful supply of tryptophan in the environment the bacterium's resources are better placed synthesising other compounds and so the trp operon is silenced. The gene that codes for the repressor (red, top left) is transcribed to mRNA (messenger ribonucleic acid, light blue) and then translated to the inactive form of the protein. When tryptophan (yellow) is present it binds the tryptophan repressor (purple), activating it. This allows it to bind to the trp operon operator (red, top centre). This stops the enzyme RNA polymerase (blue oval) from binding to the operator and initiating transcription of the operon.

Release details: Model release not required. Property release not required.

Keywords: active, amino acid, animated, animation, bacterial, biological, biology, black background, deoxyribonucleic acid, dna, gene expression, genes, genetic, genetics, inactive, inhibiting, inhibition, negative feedback, operator, regulating, regulation, repressible, repressing, repression, repressor, repressor-operator complex, transcription factor, trp operon, tryptophan operon

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Repression of the tryptophan operon

K004/0380 Rights Managed

Downloadable master

Duration: 00:00:28

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 81.0M

Original

Capture format: QuickTime Animation

Frame size: 1280x720

Codec: H.264

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