Paul Freimuth and Feiyue Teng (IMAGE) DOE/Brookhaven National Laboratory Caption Brookhaven Lab virologist Paul Freimuth (rear) led the effort to transform mouse cells to express human ACE2 receptor proteins. Feiyue Teng (front) of the Lab's Center for Functional Nanomaterials assisted in the biology lab and explored nanoscience-based applications for the proteins. Credit Roger Stoutenburgh/Brookhaven National Laboratory Usage Restrictions OK for use with stories about this research License Original 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.