Heart Tissue Beating in a Dish (video) Johns Hopkins Medicine Loading video... Caption This shows heart tissue grown in a dish from mouse cardiac progenitor cells (CPCs). The CPCs, and the tissue they built, were engineered to produce a red protein. Credit C. Kwon lab/eLife Usage Restrictions Credit journal 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.