CNTNAP2, also known as Contactin Associated Protein-Like 2, is a cell adhesion molecule that belongs to the neurexin superfamily. It plays a key role in the development and function of the nervous system, particularly in neuronal migration, axon guidance, synapse formation, and signal transmission. CNTNAP2 is predominantly expressed in the developing nervous system, where it interacts with other cell adhesion molecules, extracellular matrix proteins, and signaling molecules to regulate proper neuronal positioning and axonal pathfinding. Dysregulation of CNTNAP2 expression or function can impact brain development and neural connectivity.