Hole-Forming Nanomachines 2 (IMAGE) University College London Caption So-called membrane attack complexes -- imaged on the back of a bacterium. The scale bars correspond to 800 (left) and 30 (right) nanometres. Credit EMBO Journal (2019), https://doi.org/10.15252/embj.201899852. Usage Restrictions Credit: Dani AC Heesterbeek et al. 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.