Protein Enhances Memory (IMAGE) Salk Institute Caption Salk researchers and collaborators discovered that physical and mental activities rely on a single metabolic protein, ERRγ, that controls the flow of blood and nutrients throughout the body. In this image, ERRγ is shown (stained red) in the hippocampus, the area of the brain largely responsible for memory. The new work could point to a way to enhance learning. Credit Salk Institute Usage Restrictions with 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.