Toward a Vaccine (IMAGE) Rockefeller University Caption As part of experiments intended to guide the immune system toward the production of anti-HIV broadly neutralizing antibodies, researchers examined its response to two distinct antigens, or foreign proteins, designed to mimic the virus. Above, the antibody sequences from mice exposed to one of these antigens are grouped by color. Credit Zach Veilleux / The Rockefeller University Usage Restrictions Image may only be used to illustrate research described in the 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.