Fantastic Voyage (image) NIH/National Institute of Neurological Disorders and Stroke Share Print E-Mail Caption NIH scientists watched the inside of brain cell tubes, called microtubules, get tagged by a protein called TAT. Tagging is a critical process in the health and development of nerve cells. Credit Courtesy of the Roll-Mecak lab, NINDS, Bethesda, MD Usage Restrictions Please use for educational purposes 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.