Cells (IMAGE) University of California - Santa Cruz Caption Fluorescent antibodies were used to label the HIV gp120 protein and identify high-producing cell lines. Credit Phil Berman, UCSC Usage Restrictions For use only with news coverage of this research 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.