PGT121 Precursor (image) Scripps Research Institute Share Print E-Mail Caption Scientists from the Scripps Research Institute tracked how a family of HIV-fighting antibodies develops over time. Shown here is an early precursor antibody of the highly potent PGT121 family in complex with part of the virus. Credit Image courtesy of The Scripps Research Institute. Usage Restrictions None Share Print E-Mail 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.