NEO1 (Neogenin 1): Neogenin 1 is a pivotal cell surface receptor involved in several cellular functions, including cell adhesion, migration, and axon guidance. It is part of the immunoglobulin superfamily and holds a key role in nervous system development and the regulation of apoptosis. NEO1 serves as a receptor for netrin-1 and other ligands that regulate axonal growth and neuronal migration, processes essential for brain development. Furthermore, it contributes to maintaining tissue homeostasis and vascular development. Mutations or dysregulation of NEO1 have been linked to various developmental disorders and diseases, including cancer progression and metastasis.