NCIt definition : Eph receptor tyrosine kinases and their ligands, the ephrins, appear to lie functionally
at the interface between pattern formation and morphogenesis. They play a major role
in axonal pathfinding and target recognition during central nervous system (CNS) development.
(from Development 1999;126:2033-2044 and Exp Neurol 1999;156:218-22);
NCIt note : The signaling pathways downstream of ephrin receptors are referred to as forward signaling
while the signaling pathways downstream of the ephrin ligands are referred to as reverse
signaling. (UniProt);