Molecular Mechanisms of Ion Channel Function 
acids in the region of the protein that binds ace- 
tylcholine and identified specific residues that 
play a critical role in binding and signal transduc- 
tion by acetylcholine. These studies are teaching 
us more about the molecular basis of drug rec- 
ognition and of signal transduction in this 
protein. 
Dr. Yellen is now Associate Professor of Neu- 
robiology at Harvard Medical School. 
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