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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

The complete amino acid sequence of a cardiotoxin from the venom of Naja naja (Cambodian Cobra).

The complete amino acid sequence of a small, basic protein with cardiotoxic activity is described. This toxin, designated Naja naja F8, was isolated from the venom of Naja naja, of Cambodian origin, by gel filtration on Sephadex G-75 followed by gradient ion exchange chromatography on Bio-Rex 70. The cardiotoxin F8, molecular weight 6727 from amino acid composition, consists of 60 amino acids in a single peptide chain cross-linked by four disulfide bridges and is devoid of histidine, tryptophan, and glutamic acid. The chymotryptic and tryptic peptides from the performic acid oxidized toxin were separated by gel filtration on Sephadex G-25 and zone electrophoresis in columns of cellulose powder. The sequence was established by Edman degradation, using the direct phenylthiohydantoin method, and with the aid of carboxypetidase A, and is similar to the consequences reported for other cardiotoxins, cytotoxins, and/or lytic factors from cobra venoms, all of which show considerable homology with the functionally distinct neurotoxins.[1]

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