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AP Biology/Unit 4: Cell Communication and Cell Cycle
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Non-Genomic Estrogen Signaling

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After treating cells with estrogen, researchers measure the phosphorylation of various proteins. Which observation would provide the best evidence that estrogen activates non-genomic signaling pathways in addition to its classical genomic pathway?

A

Increased mRNA levels of target genes after 2 hours

B

Synthesis of new estrogen receptor proteins

C

Nuclear translocation of estrogen receptors

D

Rapid phosphorylation of MAP kinases within minutes

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