Roles of dystroglycan in localizing synaptic laminins and Bcam. (A–C) Laminin α4, laminin α5, and Bcam are similarly concentrated at synaptic sites of control and Dag1^loxP/loxP:Pax3-Cre muscles. (D) Dystroglycan is similarly concentrated at synaptic sites of control and Bcam^−/− muscles. Bar, 10 μm.