Transcription/translation - Promoters

Promoters are DNA sequences located in the 5' region adjacent to the transcriptional start site. RNA polymerase and accessory proteins (transcription factors) bind to the promoter to initiate production of an mRNA transcript. Interactions of proteins at the promoter regulate gene actvity by activating or repressing transcription.

gene concept,transcription,translation

  • ID: 15547
  • Source: DNALC.DNAi

Related Content

15546. Tanscription/translation - Untranslated regions

Tanscription/translation

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  • Source: DNAi

15549. Transcription/translation - Exons and introns

In most eukaryotic genes, coding regions (exons) are interrupted by noncoding regions (introns).

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  • Source: DNALC.DNAi

15579. Transcription and translation

An image relating transcription and translation.

  • ID: 15547
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  • Source: DNAi

15550. Transcription/translation -PolyA-tails - the end

The majority of eukaryotic mRNAs contain a tract of A residues at the end. These polyA-tails are not encoded in the DNA. Rather, they are added to the pre-mRNA "post-transcriptionally" (after transcription). The end of pre-mRNA is cut by a specific enzyme

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  • Type: image
  • Source: DNAi

15545. Tanscription/translation - Start and stop codons

The diagram represents a single strand of DNA containing a gene, in purple. Remember this gene is "read" in the 5' to 3' direction to produce an mRNA.

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  • Type: image
  • Source: DNAi

2299. Transcription Factors Can Turn Genes On and Off

Doctor Anil Malhotra discusses how transcription factors can turn genes on or off, possibly leading to increased or reduced risk of illness.

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  • Source: DNALC.G2C

2051. Gene expression - different levels in different cells

Professor Rusty Lansford explains that all genes are not expressed in the same levels in different cells; there is a lot of differential regulation.

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  • Type: image
  • Source: G2C

15473. The Central Dogma: transcription and translation, James Watson

James Watson talks about the Central Dogma: transcription and translation.

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  • Source: DNAi

1180. Cortical Asymmetry - Left Brain, Right Brain

Professor Daniel Geschwind explains that cortical asymmetry refers to differences between the right and left side of the brain. This relates to gene expression.

  • ID: 15547
  • Type: image
  • Source: G2C

16528. Concept 24: The RNA message is sometimes edited.

RNA splicing removes non-coding introns and splices together exons.

  • ID: 15547
  • Type: image
  • Source: DNAFTB