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key elements in cellular signaling

Lipid metabolites are often seen as key elements in cellular signaling. Is this unique? Please provide several examples of the function of lipids as key elements in signal arrays and list the biologic functions these signals affect?

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Biological signaling that involves the use of a lipid messenger to bind a protein target in order to certain cellular responses is termed as cellular signaling by lipid metabolites or lipid signaling. Yes, lipid signaling is unique when compared to other signaling metabolites because lipids diffuse freely through membranes. 

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