Stem cells turning into bone cells (2) (IMAGE) RMIT University Caption Magnified image showing adult stem cells in the process of turning into bone cells after treatment with high-frequency sound waves. Purple spots indicate the presence of a “bone marker” known as RUNX2. Magnification: 60X Credit RMIT University Usage Restrictions Credit RMIT University 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.