gene regulation lecture

gene regulation lecture - Gene Expression All the cells in...

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12/1/10 1 Gene Expression All the cells in an organism come from a single diploid cell An “expressed” gene is one that is actively being used to generate an RNA or protein Different cell types within an organism arise by expressing distinct sets of genes therefore all cells in an organism contain the same genes An individual cell can change it’s behavior by changing which genes are expressed The RNA and protein in a cell in large part determines what the cell looks like and how it behaves For ex. cardiac myocytes in the heart are different from neurons in the brain because of the [email protected] of RNAs and proteins each cell type produces
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12/1/10 2 Regulation of Gene Expression How do cells regulate which genes are expressed and when they are expressed? Regulation can be transcriptional or post-transcriptional Signals ac.ng on cells from the outside o8en drive changes in gene expression DNA mRNA TRANSCRIPTION Ribosome Polypeptide
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12/1/10 3 Transcrip.onal Transcrip.onal regulators
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