Cover image (IMAGE) Salk Institute Caption Microproteins and small proteins called smORFs are potentially a rich source of uncharacterized regulators of metabolism. Credit Salk Institute and Cell Metabolism Usage Restrictions with credit and related coverage. License Original 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.