Arrested Development (IMAGE) Rockefeller University Caption When the researchers reduced the activity of TET enzymes in developing granule cells, it impaired the cells' ability to form connections. The granule cells (green) remained immature, with branches extending in only two directions. Credit Laboratory of Developmental Neurobiology at The Rockefeller University/Neuron Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. 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.