Antimicrobial peptides in frog poisons constitute a molecular toxin delivery system against predators

To avoid being eaten, poisonous prey animals must rely on fast passage of toxins across a predator’s oral tissue, a major barrier to large molecules. Here, Raaymakers et al. show that antimicrobial peptides co secreted with frog toxins enhance intoxication of a snake predator by permeabilizing oral cell layers.