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2003 FEB 5 - (NewsRx.com & NewsRx.net) -- According to recent research from France, "Scorpion neurotoxins acting on ion channels share some structural features but differ in antigenic and immunogenic properties. They are highly structured peptides, 60-70 amino acids long. Monoclonal antibodies have been obtained for Androctonus australis hector scorpion venom neurotoxin II (AahII) and a nontoxic synthetic analog ((Abu)[subscript]8AahII)."
"In this study, no antibody response was elicited in mice of various strains injected with AahI, the other important toxin of the venom, in a native or an inactive ((Abu)[subscript]8AahI) form," reported Christiane Devaux and colleagues at the Centre National de la Recherche Scientifique in Marseille. "We found that AahI was only immunogenic in BALB/c or C57BL/6 mice if it was coupled to a carrier protein. The helper protein molecule could be BSA, KLH, or the nontoxic analog of AahII. We obtained a panel of high-affinity mAbs with these immunogens. Two of these mAbs, including the very high-affinity antibody 9C2 (K[subscript]D=0.11x10[superscript]-11 M), were used to set up a two-site ELISA, sensitive ...