“…Mutants carrying reduced striations in somatic muscles, such as fibrils unbundeled and sapje, were shown to have abnormal myofiber organization (Felsenfeld et al, 1990;Bassett et al, 2003). The genes mutated in the mutants nic/twister, sofa potato, ache/zieharmonika, twitch once and sapje were, respectively, identified as the α-subunit of the nicotinic acetylcholine receptor, the δ-subunit of the nicotinic acetylcholine receptor, acetylcholinesterase, rapsyn and the Duchenne muscular dystrophy gene (Sepich et al, 1998;Lefebvre et al, 2004;Ono et al, 2004;Behra et al, 2002;Downes and Granato, 2004;Ono et al, 2002;Bassett et al, 2003).…”