CYTOR and muscular dystrophy: The major findings of the present study show that I) CYTOR exon 2 recapitulates the pro‐myogenic effect of full‐length CYTOR in muscular dystrophy, II) N1‐me‐PseudoU (m1Ψ), m7G 5′cap and poly‐A modifications render CYTOR exon 2 RNA more resilient to degradation and reduce its immunogenic response, III) CYTOR exon 2 RNA delivery enhances fast‐twitch myogenesis in pluripotent stem cells, muscle progenitors and dystrophic primary myoblasts in mouse and human.