We compared CCNA1 expression by RT-PCR between myoblasts and myotubes and found similar cyclin A1 RNA expression levels in myoblast and myotubes in both healthy controls (Fig. 2C, n = 14) and FSHD patients (Fig. 2D, n = 7). This evidence concerns the gene CCNA1 and facioscapulohumeral muscular dystrophy.