Induces an immediate fast muscle contraction followed by flaccid paralysis when injected into blowfly larvae. Has strong cytolytic activity against insect Sf9 cells and human HeLa cells, weak activity against human JAR cells, and no activity against human HEK293 cells. Binds to erythrocyte membranes and has hemolytic activity, probably mediated by oligomerization and pore formation. PD(50) is 0.103 mg/kg by injection in blowfly larvae. Belongs to the hydralysin family.