Involved in neuronal differentiation. Homodimer (By similarity). Interacts with AHI1 (By similarity). Associated with the plasma membrane and the membranes of intracellular organelles. Found in the spinal cord, cerebellum and cerebrum, where it is localized in neurons. Appears during early brain development where it increases with age to give high levels in the mature animal. Belongs to the CEND1 family.