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  • Title: Chemical and pharmacological characterization of toxic polypeptides from the venom of Bungarus caeruleus.
    Author: Bon C, Changeux JP.
    Journal: Eur J Biochem; 1977 Mar 15; 74(1):31-42. PubMed ID: 856573.
    Abstract:
    Five toxic fractions have been purified to homogeneity from the venom of Bungarus ceruleus by chromatography on CM-Sephadex, QAE-Sephadex and Bio-Rex 70 followed by filtration on Sephadex G-50 and Biogel P-30. One of them blocks synaptic transmission at the pre-synaptic level and is identified as a beta-bungarotoxin similar to that described by Lee from the venom of B. multicinctus. Three other ones are short-chain (type I) alpha-toxins which block the response of the isolated electroplaque from Electrophours electricus to bath-applied carbamylcholine. These basic polypeptides of 61-62 amino acids contain four disulfide bridges. A postsynaptically acting toxin, different from the alpha-toxins, has also been purified from the same venom. This ceruleotoxin is acidic and made up of several subunits.
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