Ephrin type-A receptor 2 (EPHA2), belongs to the receptor tyrosine kinases (RTKs) family, that binds promiscuously membrane-bound ephrin-A family ligands residing on adjacent cells, leading to contact-dependent bidirectional signaling into neighboring cells. Research studies have shown that Eph receptors and ligands may be involved in many diseases including cancer (PMID: 11114742). The "reverse signaling" function, whereby the cytoplasmic domain becomes tyrosine phosphorylated, allows interactions with other proteins that may activate signaling pathways in the ligand-expressing cells. The detected molecular weight is around 110 kDa.