Abstract

EpIBP, an insulin-like peptide-binding protein, is a major protein component of the venom of a solitary hunting wasp, Eumenes pomiformis. To evaluate the bioactivity, bacteria-expressed EpIBP was injected into Spodoptera exigua larvae, resulting in a higher survival rate and reduced loss of body weight under starvation conditions than control larvae. EpIBP was found to interact with apolipophorin III (apoLp III), implying that EpIBP might function by altering the apoLp III-mediated metabolism of prey.

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