Illustration (IMAGE) Stanford University Caption Glycans are a common carbohydrate found on cell surfaces that are known to modify lipids (fats) and proteins in a process called glycosylation. Now there's evidence that some living things use RNA as a third scaffold for glycosylation. Credit Ryan Flynn Usage Restrictions Image may only be used with appropriate caption or credit 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.