(IMAGE) Johannes Gutenberg Universitaet Mainz Caption Therapeutic protein, conjugated with multiple polyethylene glycol (PEG, blue) chains that lead to the "stealth effect", avoiding recognition by the immune system. In the ERC Advanced Grant project, new structures for the PEGylation will be developed. Credit ill./©: Holger Frey Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.