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colleen colleen
wrote...
Valued Member
Posts: 17077
12 years ago
There is a tremendous variety of signal transduction pathways with a wide range of functions. However, all these pathways have some things in common. Discuss some of these common features. 
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Sunshine ☀ ☼

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wrote...
Valued Member
12 years ago
All signal transduction pathways start with a ligand, the chemical message, binding to a receptor. The receptor will change its conformation because the weak bonds that hold the protein in one conformation change when the ligand binds. This leads to the activation of an intracellular substance, which may activate another substance. This cascade of events allows a very small original signal to amplify the signal in its target cell.   
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