MEF2C and myotonic dystrophy type 1: Within our dataset, previously identified DM1-associated events were predominantly found at the myotube stage and examples include ARHGEF10L, BIN1, TNNT3, NCOR2, NUMA1, MBNL1, GOLGA4, and MEF2C (Fig. 6A) though CDK10 and MACF1 were already present at the myoblast stage.