Cloning and structure of cDNA encoding α‐latrotoxin from black widow spider venom

Abstract
CDNA encoding the putative alpha-latrotoxin precursor was isolated from spider venom glands cDNA library and sequenced. The cDNA contained the 4203 base-pair open reading frame corresponding to the 156,855-Da protein composed of 1401 amino acids. Computer analysis of the deduced primary structure revealed the presence of various internal imperfect repeats mainly in its central and C-terminal regions.