Cell Signaling: Receptors

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Α subunit

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Α subunit

________ and β /γ dimer interact with other proteins in a signaling pathway.

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Signals

________ binding to cell surface are "first messenger.

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receptor complex

An activated hormone- ________ can act as a transcription factor, turning on specific genes.

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GTP

________ causes G protein to dissociate.

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G protein

Activated receptor activates ________.

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intracellular domains

Many receptors have ________ with enzyme function.

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Intracellular receptors

________: found in the cytosol or nucleus of target cells.

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Growth factor

________- hormone that acts to stimulate cell growth or division.

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Receptor tyrosine kinases

________: category of enzyme- linked receptors found in animals.

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Receptor tyrosine kinases

category of enzyme-linked receptors found in animals

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Growth factor

hormone that acts to stimulate cell growth or division

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example

Epidermal Growth Factor (EGF)

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Intracellular receptors

found in the cytosol or nucleus of target cells

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Three kinds of cell surface receptors

Enzyme-linked receptors (RTK)

G-protein coupled receptors (GPCR)

Ligand-gated ion channels

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