This gene encodes one of several proteins that are critical in the development of the neuromuscular junction (NMJ), as identified in mouse knock-out studies. The encoded protein contains several laminin G, Kazal type serine protease inhibitor, and epidermal growth factor domains. Additional post-translational modifications occur to add glycosaminoglycans and disulfide bonds. In one family with congenital myasthenic syndrome affecting limb-girdle muscles, a mutation in this gene was found. Alternative splicing results in multiple transcript variants encoding different isoforms.,AGRN,AGRIN,CMS8,CMSPPD,agrin,Signal Transduction,Cell Biology & Developmental Biology,Cell Adhesion,Neuroscience,Cell Type Marker,Neuron marker,Growth Cone,AGRN