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Reduction of disulfide bonds of cobra neurotoxin by dithiothreitol results in decreased activity on the electroplax preparation. Activity is restored completely after reoxidation by 3,3'-dithiobis[6-nitrobenzoic acid]. Reduction of the disulfide bonds in the vicinity of the receptor does not decrease the effect of cobrotoxin.
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Bartels et al. (1971) studied this question.
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