Protein Structure of DHFR (IMAGE) Georgia Institute of Technology Caption This is the structure of the E. coli DHFR protein (white) with its folate (blue) present at the enzymatic pocket and bromo-resveratrol (green) bound at the potential allosteric site responsible for antibiotic activity in escape variants of E. coli. Credit Courtesy of Jeffrey Skolnick 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.