Purification and characterization of a bungarotoxin polypeptide which blocks nicotinic receptor function in primary culture of adrenal chromaffin cells.


In primary cultures of bovine chromaffin cells, commercially available preparations of alpha-bungarotoxin inhibit the acetylcholine (ACh)- or nicotine-evoked release of endogenous catecholamines. The potency of different lots of alpha-bungarotoxin is not related to the alpha-bungarotoxin peptide content but to that of another peptide (termed P-4… (More)


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