Early in her career, Linda Shapiro cloned a molecule. Ever since then she's been working to discover the function of that molecule known as CD13. Now, after 20 years, Shapiro, an associate professor of cell biology at the UConn Health Center, could be on the verge of a major breakthrough. If her theories are correct, scientists could use what they know of CD13 to improve on the body's own way of repairing itself after a heart attack, better guiding stem cells to the damaged heart, and potentially improving a person's chances for recovery. In this video, Shapiro and Dr. Bruce Liang, director of the Calhoun Cardiology Center, describe the groundbreaking research.