Predicted to enable ephrin receptor binding activity. Predicted to be involved in axon guidance; ephrin receptor signaling pathway; and osteoclast differentiation. Predicted to act upstream of or within cell differentiation and nervous system development. Predicted to be located in side of membrane. Predicted to be active in plasma membrane. Is expressed in brain; hindbrain neural keel; midbrain neural rod; and midbrain neural tube. Orthologous to human EFNA2 (ephrin A2).