(IMAGE) Institute of Science and Technology Austria Caption Precursor cells in the embryonic neural tube are organized in a specific striped pattern which depends on the signals they receive (left). Lehr and colleagues recreated this pattern in a cell culture dish by exposing stem cells to the same signals (right). Credit © Stefanie Lehr/ISTA Usage Restrictions Free to use when reporting about ISTA. License Original 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.