D25 binding to the F protein of the RSV (IMAGE) DOE/Argonne National Laboratory Caption Data taken at the APS shows the neutralizing antibody D25 binding to the F protein of the Respiratory Syncytial Virus (RSV). This binding stabilizes the protein in its prefusion form. Several COVID-19 vaccines include similar mutations that stabilize spike proteins in their more vulnerable form. Credit Jason McLellan 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.