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Two derivatives of α-toxin from Naja nigricollis venom were used in order to study, by resonance Raman spectroscopy, its interaction with the nicotinic acetylcholine (AcCho) receptor from membranes of Torpedo marmorata electrocytes. The two modified toxins carry either an NO 2 group bound to Tyr 25 or a nitrophenylthioether (NPS) bound to Trp 25 . The comparison of...
We previously reported the production of a fused snake neurotoxin composed of protein A and erabutoxin a in E. coli [1]. The hybrid had much lower toxicity and affinity for the acetylcholine nicotinic receptor than natural erabutoxin. By treating the hybrid with cyanogen bromide we generated a toxin which was purified in a single step by RP-HPLC. This compound, produced in a good yield, recovered...
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