Purity ~95% (SDS-PAGE). Epha4, as known as ephrin type-A receptor 4, is a single-pass type 1 membrane protein which belongs to the protein kinase superfamily and ephrin receptor subfamily. This protein may play a role in a signal transduction process involved in hindbrain pattern formation. The ephrins and ephrin receptors comprise the largest subfamily of receptor protein-tyrosine kinases and have been implicated in mediating developmental events, especially in the nervous system and in erythropoiesis. Source: Recombinant protein corresponding to aa20-547 from mouse Epha4, fused to His-Tag at C-terminal, expressed in insect cell. Molecular Weight: ~59.3kD (536aa) 50-70kD (SDS-PAGE under reducing conditions) Endotoxin: ~1EU/1ug (LAL)