Catalytic activity:ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate. ,Disease:Defects in EPHA3 may be a cause of colorectal cancer (CRC) [MIM:114500]. ,Function:Receptor for members of the ephrin-A family. Binds to ephrin-A2 , -A3 , -A4 and -A5. Could play a role in lymphoid function. ,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. ,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. Ephrin receptor subfamily. ,similarity:Contains 1 protein kinase domain. ,similarity:Contains 1 SAM (sterile alpha motif) domain. ,similarity:Contains 2 fibronectin type-III domains. ,tissue specificity:Widely expressed. Highest level in placenta. ,
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