MeSH definition : A family of cell surface receptors that were originally identified by their structural
homology to neurotropic TYROSINE KINASES and referred to as orphan receptors because
the associated ligand and signaling pathways were unknown. Evidence for the functionality
of these proteins has been established by experiments showing that disruption of the
orphan receptor genes results in developmental defects.;
A family of cell surface receptors that were originally identified by their structural
homology to neurotropic TYROSINE KINASES and referred to as orphan receptors because
the associated ligand and signaling pathways were unknown. Evidence for the functionality
of these proteins has been established by experiments showing that disruption of the
orphan receptor genes results in developmental defects.