Cells Fantastique (IMAGE) Columbia University Caption A green stain reveals neuroblasts, which are precursor cells that become neurons, specifically in the nerve cord of a fly embryo; the magenta stain lights up neuroblasts residing both within and without of the nerve cord. Credit Kohwi Lab; Zuckerman Institute Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.