Developing Mouse Embryos (IMAGE) Salk Institute Caption The Salk researchers found similarities in genetic activity of breast cancers and mammary stem cells found in developing mouse embryos (pictured here against a background of fat tissue). Their findings offer clues to developing personalized therapies for cancers. Credit Image: Courtesy of Dannielle D. Engle Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. 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.