Topic 8 - Receptors

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How do phytochromes switch processes on or off?

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They bind to DNA to allow transcription of light-regulated genes

These proteins result in the plant's response to light

They may do this by interrupting the binding

Gene is transcribed and translated, synthesising specific proteins

Activated phytochromes interact with other proteins

These signal proteins may act as transcription factors

Phytochromes change shape when exposed to light


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