Component of a cell-surface receptor complex that mediates cell-cell interactions between muscle precursor cells. Promotes differentiation of myogenic cells (By similarity). Part of a complex that contains BOC, CDON, NEO1, cadherins and CTNNB1. Interacts with NTN3. Interacts with DHH, IHH and SHH (By similarity). Interacts with PTCH1. Interacts with GAS1. Detected at low levels in stomach, spleen, brain, large intestine and lung. Down-regulated in actively dividing cells. Not detectable in suspension cultures. Accumulates only in cells that are attached to a solid substrate (in vitro). N-glycosylated.