Nuclei (IMAGE) RIKEN Caption Image of nuclei of proliferating neural stem cells (green) and blood vessels (red) tunneling into the transparent hippocampus. The green signal comes from the Fucci S/G2/M marker. Credit RIKEN Usage Restrictions None 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.