(IMAGE) Institute of Science and Technology Austria Caption Building the superior colliculus without Pten gene. Section of a mouse superior colliculus where the Pten gene was removed in all green cells but kept intact in all red cells during development using the MADM technique to allow direct comparison of diverse cell types. Credit © Hippenmeyer Lab / 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.