Scanning electron microscopy image of E. coli undergoing programmed cell death triggered by ObgE*, a toxic isoform of the essential GTPase ObgE. Image by Liselot Dewachter, Natalie Verstraeten, Daniel Monteyne, David Pérez-Morga, Maarten Fauvart, and Jan Michiels (KU Leuven, Belgium); modified by MIC. The cover is published under the Creative Commons Attribution (CC BY) license.