Dystrophin is a protein found in muscle cells that plays a crucial role in maintaining the structural integrity of muscle fibers. It connects the cell membrane of muscle cells to the underlying cytoskeleton, helping to protect muscles from damage during contraction and relaxation. Mutations in the gene responsible for producing dystrophin can lead to muscle disorders, most notably Duchenne muscular dystrophy (DMD). DMD is a genetic condition that primarily affects boys and results in progressive muscle weakness and degeneration, highlighting the importance of dystrophin in muscle health.