Biosensor in Bacteria (image) University of Washington Share Print E-Mail Caption This image is the first visualization of a second messenger through a biosensor in bacteria, which are much smaller than animal or plant cells. Credit Matthias Christen Usage Restrictions For use by news media, education institutions, and museums only. 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.