Protein-RNA vesicles (differential interference contrast microscopy) (IMAGE) University at Buffalo Caption Differential interference contrast microscopy images show protein-RNA vesicles created in the lab. The vesicles -- hollow, spherical sacks -- were made without traditional lipid building blocks. The scale bar shows a length of 10 microns. Credit Ibraheem Alshareedah Usage Restrictions This image may only be used with news stories discussing the research in the associated press release. 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.