Microtubules (IMAGE) University of Georgia Caption In this image, mammalian cells are labeled with an antibody that reveals microtubules, which serve as tracks for the shuttling of materials from one part of the cell to another. A new University of Georgia study published in the journal Nature has identified a critical enzyme that keeps traffic flowing in the right direction in the microtubules of nervous system cells. Credit Dorota Wloga/University of Georgia Usage Restrictions Please credit Dorota Wloga/University of Georgia 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.