EMB and Duchenne muscular dystrophy: On the other hand, embryonic MyHC (MyHC-emb), which is known to be re-expressed during early muscle regeneration and in many muscle diseases such as Duchenne muscular dystrophy [31], was more broadly detected in Scgb3a1−/− TA muscles than in Scgb3a1+/+ muscles (Supplementary Fig. S3, white arrow).