MBNL1 and myotonic dystrophy type 1: The cytoplasmic and total expression of MBNL1 protein in DM1-03 SSCs was significantly lower than that in DM1-04 SSCs, while that in DM1-13-3 SSCs was higher than that in DM1-03 SSCs, but lower than that in DM1-04 SSCs (Fig. 2d–g).