MYL3 and Duchenne muscular dystrophy: Four proteins that are abundant in skeletal muscle tissue, that is, myofibrillar proteins skeletal troponin I (sTnI), myosin light chain 3 (MYL3), fatty acid binding protein 3 (FABP3), and creatine kinase muscle-type (CKM), were determined to be significantly elevated in serum of both DMD and BMD patients and correlated with certain clinical endpoints in DMD patients, such as forced vital capacity.42