Muscle Developed From Stem Cells (IMAGE) Sanford Burnham Prebys Caption The image shows human differentiated myotubes expressing MyoD (nuclear staining -- red; nuclei are also counterstained with DAPI - blue) and MyHC (cytoplasmic staining -- green). Credit Alessandra Dall'Agnese Usage Restrictions None 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.