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The amino acid sequence and position of the free thiol group of a short-chain neurotoxin from common-death-adder (Acanthophis antarcticus) venom.

ABSTRACT: The amino acid sequence of a short-chain neurotoxin Acanthophis antarcticus c (toxin Aa c) from the venom of an Australian elapid snake, the common death adder (Acanthophis antarcticus, subfamily Acanthophiinae) was elucidated. Toxin Aa c is composed of 62 amino acid residues, including eight half-cystine residues and a cysteine residue. The amino acid sequence of toxin Aa c is homologous with those of other short-chain neurotoxins found in snakes of the family Elapidae, especially with those from snakes of the subfamily Hydrophiinae. The single cysteine residue was located in position 4. Toxin Aa c has a lethal dose (LD50) of 0.08 micrograms/g body weight of mouse on intramuscular injection.

PROVIDER: S-EPMC1163351 | BioStudies | 1981-01-01

REPOSITORIES: biostudies

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