(IMAGE) Institute of Science and Technology Austria Caption Visualizing gene expression. Gene expression visualized in a stem cell-based 3D cell culture model of a mammalian embryo. Credit © Melody Merle / Institut Pasteur Usage Restrictions Free to use when reporting about ISTA 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.