Co-culture (image) Max Planck Institute for Chemical Ecology Share Print E-Mail Caption This is an electron micrograph of genetically modified Acinetobacter baylyi and Escherichia coli strains. The bacteria exchange amino acids via nanotubes (i.e. tube-like connections between cells). Credit Martin Westermann, Electron Microscopy Center, University Hospital, Friedrich Schiller University Jena, Germany Usage Restrictions None Share Print E-Mail 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.