GNB1 Protein (IMAGE) Columbia University Irving Medical Center Caption Columbia researchers have identified a new neurodevelopmental disorder caused by mutations (labeled red and yellow in the image) in the GNB1 protein (labeled green). Credit American Journal of Human Genetics 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.