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PhTx neurotoxin family This family consists of PhTx insecticidal neurotoxins that are found in the venom of Brazilian, Phoneutria nigriventer. The venom of the Phoneutria nigrivente contains numerous neurotoxic polypeptides of 30-140 amino acids which exert a range of biological effects. While some of these neurotoxins are lethal to mice after intracerebroventricular injections, others are extremely toxic to insects of the orders Diptera and Dictyoptera but had much weaker toxic effects on mice.
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