gp120 Complex (IMAGE) California Institute of Technology Caption This image of the complex studied by the Caltech team shows gp120 in gray, CD4 in green, the 21c antibody's light chain in yellow, and its heavy chain in magenta. Credit Caltech/Ron Diskin Usage Restrictions With credit as given above 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.