Component of a cell-surface receptor complex that mediates cell-cell interactions between muscle precursor cells. Promotes differentiation of myogenic cells. Required for response to NTN3 and activation of NFATC3. Part of a complex that contains BOC, CDON, NEO1, cadherins and CTNNB1. Interacts with NTN3. Interacts with DHH, IHH and SHH (By similarity). Highly expressed in somites and the dorsal lips of the neural tube during embryogenesis. Detected at very low levels in adult tissues. Transiently up-regulated during myoblast differentiation. N-glycosylated.