Artwork by Helen Spears (IMAGE) University of Exeter Caption An international research collaboration has shed new light on how DNA sequence variation can influence gene activity in the developing human brain. Credit Helen Spears Usage Restrictions Use with accreditation. 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.