Photoaffinity labeling of Torpedo acetylcholine receptor at multiple sites.


The acetylcholine receptor from Torpedo californica electroplax was labeled with the photoaffinity reagent bis(3-azidopyridinium)decane perchlorate. All four receptor subunits (alpha, beta, gamma, and delta) were specifically labeled. In the presence of cholinergic agonists the gamma-, beta-, and delta-subunit labeling was decreased significantly, whereas… (More)


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