The correlation of utrophin levels with the dystrophin associated protein complex (DAPC) proteins β-dystroglycan (β-DG) and ɣ-sarcoglycan (ɣ-SG) levels was investigated in muscle sections from 1 young (P11; 4 years of age) and 1 older DMD patient (P12; 8 years of age) by co-labelling utrophin with either β-DG or ɣ-SG antibody (S1 Fig). Here, UTRN is linked to Duchenne muscular dystrophy.