Atomic Force Microscope Image (IMAGE) Ohio State University Caption In this atomic force microscope image, the color red indicates where a Shewanella oneidensis bacterium is expressing the protein OmcA in order to “breathe” the metallic mineral hematite. An oval marks the approximate location of the bacterium. OmcA is clearly present around the edges of the bacterium -- in the outer membrane -- and in an ooze surrounding the bacterium. Credit Image courtesy of Brian Lower, Ohio State University. Usage Restrictions News media use only. 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.