Similarly, the median serum titin/Cr ratios in the DMD, BMD, and control groups were 4,522 (623–58,070), 446 (26–22,403), and 42 (34–50) pmol/mg Cr, respectively, and were significantly higher in the DMD group than in the BMD and control groups (p < 0.0001) (Figure 1D). This evidence concerns the gene TTN and Duchenne muscular dystrophy.