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Heart muscle contains a form of PFK-2/FBPase-2 that is different from that in liver. In heart...

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Biology

Heart muscle contains a form of PFK-2/FBPase-2 that is differentfrom that in liver. In heart muscle, phosphorylation ofPFK-2/FBPase-2 by protein kinase A (also called cAMP-dependentprotein kinase) activates PFK-2 and inhibits FBPase-2. Explain whythis makes metabolic sense for a response of heart muscle toepinephrine. (Heart muscle cells have receptors for epinephrine,but not for glucagon.)

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