CA Protein Hexamer (IMAGE) Scripps Research Institute Caption This is a view of the CA protein hexamer, which makes up the HIV capsid. This image, which reflects a perspective from inside the capsid, is a superposition of the structures reported in the new Cell paper. It shows that six N-terminal domains of CA (colored orange) form the core of the hexamer, and this core is surrounded by a floppy belt of C-terminal domains (colored blue). Credit The Scripps Research Institute Usage Restrictions None 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.