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- W1591570669 abstract "Monoclonal antibodies raised against the nicotinic acetylcholine receptor of Electrophorus electricus electroplaque have been used as probes to characterize putative nicotinic acetylcholine receptors in goldfish brain. One monoclonal antibody (mAb), mAb 47, recognized a protein which binds both (-)-[3H]nicotine and 125I-alpha-bungarotoxin with high affinity. Another monoclonal antibody (mAb 172) recognized a protein which binds (-)-[3H]nicotine but not 125I-alpha-bungarotoxin. Both antibodies precipitated a protein(s) (biosynthetically labeled with [35S]methionine) in the absence, but not in the presence, of excess purified nicotinic acetylcholine receptor from Torpedo nobiliana. The dilution of mAb 47 that precipitated half of the maximum amount of 125I-alpha-bungarotoxin binding protein was the same as that which precipitated half of the maximum amount of (-)-[3H]nicotine binding activity. When used in combination, the two antibodies precipitated more (-)-[3H]nicotine radioactivity than either antibody alone. The (-)-[3H]nicotine and 125I-alpha-bungarotoxin binding component-mAb complexes were characterized by sucrose density centrifugation. In the presence of either mAb 172 or 47, the (-)-[3H] nicotine binding component migrated further into the gradient, but only mAb 47 shifted the 125I-alpha-bungarotoxin peak. Incubation of solubilized brain extract with alpha-bungarotoxin-coupled Sepharose reduced the amount of (-)-[3H]nicotine radioactivity precipitated by mAb 47 but not by mAb 172. These data suggest that the antibodies may recognize distinct subtypes of (-)-nicotine binding sites in goldfish brain, one subtype which binds both 125I-alpha-bungarotoxin and (-)-[3H]nicotine and a second subtype which binds only (-)-[3H] nicotine." @default.
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- W1591570669 date "1988-07-01" @default.
- W1591570669 modified "2023-09-26" @default.
- W1591570669 title "Interaction of monoclonal antibodies with alpha-bungarotoxin and (-)-nicotine binding sites in goldfish brain. Identification of putative nicotinic acetylcholine receptor subtypes." @default.
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- W1591570669 doi "https://doi.org/10.1016/s0021-9258(19)81572-7" @default.
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