This image shows the restoration of dystrophin (stained green) in Duchenne muscular dystrophy (DMD) muscle cells derived from human induced pluripotent stem cells. DMD is caused by mutations in the DMD gene that affect the production of dystrophin, a protein involved in muscle cell membrane structure. Researchers used CRISPR/Cas9 gene editing technology to correct a mutation, resulting in dystrophin restoration. This technology could be therapeutic in up to 60% of DMD patient mutations. Nuclei in the muscle cells are stained blue and the contractile protein myosin is stained red.