Synthetic Polymer (image) University at Buffalo Share Print E-Mail Caption Here is a rendering of how the synthetic polymer -- called poly (beta amino ester) wraps around the E. coli-based core creating a sort of hybrid capsule. Credit University at Buffalo. 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.