Targeting Human Proteins to Treat HIV (IMAGE) University of Southern California Caption Delta 20 (green) is highly expressed in HIV target cells that restrict acute HIV infection. Cell nuclei are shown in blue. Credit Wan-Lin Wu Usage Restrictions Please use caption and credit. 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.