Upstream and downstream (transduction): Difference between revisions
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[[Category:Molecular biology]] |
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Revision as of 22:41, 25 November 2007
In molecular biology, the terms upstream and downstream can refer to the temporal and mechanistic order of cellular and molecular events. For example, in signal transduction, the second messenger acts downstream to activation of cell membrane receptors. The other way around, activation of cell membrane receptors occurs upstream of the production of second messengers.