Membrane Attack (IMAGE) Monash University Caption Artist's impression of the perforin-like protein Plu-MACPF. Australian scientists have found that this protein belongs to an ancient and lethal toxin family previously only found in bacteria. (acrylic on canvas) Credit Carla Chinni Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.