Unformatted text preview: within the cell. Signal transduction pathways act like falling dominoes. The signal-activated receptor activates another protein, which activates another, and so on, until the protein that produces the final cellular response is activated. The relay molecules that relay a signal from receptor to response are mostly proteins. o The interaction of proteins is a major theme of cell signaling. o In fact, protein interaction is a unifying theme of all cellular regulation. The original signal molecule is not passed along the pathway and may not even enter the cell. When the signal is relayed along a pathway, information is passed on. At each step, the signal is transduced into a different form, often by a conformational change in a protein. The conformational change is often brought about by phosphorylation....
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- Fall '10
- Biology, signal transduction pathways, signal transduction pathway—that