RA3 Gene Activity in Maize Ear (IMAGE) Cold Spring Harbor Laboratory Caption RA3 gene activity was detected and traced to presence in nucleus and cytoplasm of developing cell in maize ear. RA3 is in green and nuclei are counterstained in red. Credit Jackson lab/CSHL Usage Restrictions Attribution necessary 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.