Myasthenic Syndrome, Congenital, 6, Presynaptic, also known as familial infantile myasthenia, is related to myasthenic syndrome, congenital, 12 and myasthenic syndrome, congenital, 1a, slow-channel, and has symptoms including apnea, respiratory distress and ophthalmoparesis. An important gene associated with Myasthenic Syndrome, Congenital, 6, Presynaptic is CHAT (Choline O-Acetyltransferase), and among its related pathways/superpathways are Transmission across Chemical Synapses and Neurotransmitter release cycle. Affiliated tissues include skeletal muscle, and related phenotypes are fatigable weakness and bulbar palsy