Science image (IMAGE) Salk Institute Caption Liver cells were partially reprogrammed into younger cells (red) using Yamanaka factors (white). The cell nuclei (blue) and cytoskeletal proteins (green) are also shown. Credit Salk Institute 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.