Depletion of ATP in E. coli (image) Arizona State University Caption The depletion of ATP in cells of the bacterium Escherichia coli causes them to transition to a filamentous state and form dense lipid structures known as endoliposomes. The structures can be clearly observed in these transmission electron micrographs of increasing magnification. Credit The Biodesign Institute at Arizona State University Usage Restrictions None 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.