Tendon Stem Cells Revealed (IMAGE) Carnegie Institution for Science Caption This image shows the Patellar tendon 30 days after an injury. The red marks newly discovered tendon stem cells that have self-renewed and are layered over green marked, original tendon cells. During regeneration, some tendon stem cells differentiate to make newly regenerated tendon cells--a process during which they transition into a yellow-orange color. The blue indicates cellular nuclei. Credit Photography is courtesy of Tyler Harvey. 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.