Process of Selection (IMAGE) Rockefeller University Caption The immune system produces antibodies finely tuned to target a foreign protein, called an antigen. Recent research describes how the interaction between T cells (green) and B cells (blue) allows this to take place. Bystander B cells and antigen appear in red. Credit Laboratory of Molecular Immunology at The Rockefeller University Usage Restrictions Image may only be used to illustrate research described in accompanying release. 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.