The genes were ALG13 (OMIM 300776), DOK7 (OMIM 610285), and RPH3A. ALG13 along with ALG14 (OMIM 612866) encodes the UDP‐GlcNAc transferase, which catalyzes a key step in endoplasmic reticulum N‐linked glycosylation Since mutations in ALG14 have recently been reported in association with CMS (Cossins et al., 2013) any rare sequence variant in ALG13 was considered potentially relevant. The gene discussed is RPH3A; the disease is congenital myasthenic syndrome.