Newly Identified Enhancer Activity in Zebrafish Brain (image) Johns Hopkins Medicine Share Print E-Mail Caption The glowing areas in this zebrafish embryo show the activity of one of the brain enhancer sequences identified. The enhancer is directing the activity of a gene in the lower areas of the central nervous system and in the lens of the eye. Credit G. Burzynski Usage Restrictions None Share Print E-Mail 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.