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[ 3 H]nicotine has been used as a photoaffinity agonist to identify amino acids within the Torpedo nicotinic acetylcholine receptor (nAChR) γ-subunit that contributes to the structure of the agonist binding site. UV irradiation (254 nm) of nAChR-rich membranes equilibrated with [ 3 H]nicotine results in covalent incorporation into α- and γ-subunits that is inhibitable by agonists and...
The NH 2 -terminal blocking group of the 43-kDa peripheral membrane protein (43-kDa protein) of Torpedo post-synaptic membranes has been identified as myristic acid. To identify that blocking group pure 43-kDa protein was digested with trypsin and the blocked tryptic peptide was isolated by reverse phase HPLC. That peptide coeluted with and had the same amino acid composition as a synthetic...
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