Question: Certain hormones, such as epinephrine, can increase the levels of cAMP within cells. Let's suppose you pretreat cells with or without epinephrine and then prepare

Certain hormones, such as epinephrine, can increase the levels of cAMP within cells. Let's suppose you pretreat cells with or without epinephrine and then prepare a cell extract that contains the CREB protein (see Chapter 15 for a description of the CREB protein). You then use a gel retardation assay to analyze the ability of the CREB protein to bind to a DNA fragment containing a cAMP response element (CRE). Describe what the expected results would be.

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