Abstract
Robustoxin is the lethal polypeptide toxin in Atrax robustus venom. A monoclonal antibody was produced using synthetic, unfolded robustoxin conjugated to keyhole limpet haemocyanin as the immunogen. This monoclonal antibody did not protect newborn mice against challenge with the crude venom of the male Sydney funnel-web spider, but did slightly prolong their survival time. Western blotted crude venom of the male Sydney funnel-web spider showed two monoclonal antibody binding bands. One band at low M r corresponded to robustoxin ( M r 4854), while the other higher M r band (approximately 37,000) may be due to a pre-robustoxin molecule.
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