Myasthenic Syndrome, Congenital, 2a, Slow-Channel, also known as cms2a, is related to myasthenic syndrome, congenital, 1a, slow-channel. An important gene associated with Myasthenic Syndrome, Congenital, 2a, Slow-Channel is CHRNB1 (Cholinergic Receptor Nicotinic Beta 1 Subunit). Affiliated tissues include skeletal muscle, and related phenotypes are ptosis and high palate