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Signaling responses

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Why do signalling responses that require changes in proteins already present in the cell occur in milliseconds to seconds, whereas responses that involve changes in gene expression usually take hours? Ideas are shown.

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Solution Summary

Signaling responses and proteins are correlated.

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If a protein is already present in the cell, then the effect is usually rapid. Why? Often the effect is a simple phosphorylation or a dephosphorylation event on the protein. This biochemical reaction is simple, and can happen ...

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