MBNL1 and myotonic dystrophy type 1: The amount of MBNL1 detected increased in the cytoplasm and in the cell nuclei of DM1 myoblasts grown either with 100 μM of 1–3 or 40 μM of 2–5, compared to DM1 myoblasts exposed to 1% DMSO alone (solvent, Fig 8A).