P190, CASPR, NRXN4, CNTNAP, Contactin-associated protein 1, Caspr1, Neurexin IV, Neurexin-4, CNTNAP1
Seems to play a role in the formation of functional distinct domains critical for saltatory conduction of nerve impulses in myelinated nerve fibers. Seems to demarcate the paranodal region of the axo-glial junction. In association with contactin may have a role in the signaling between axons and myelinating glial cells.
