Catalytic activity:ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate. ,developmental stage:Expressed at high levels during early embryonic development. The expression levels drop strongly around day 16 and there are only very low levels in adult tissues. ,Function:Tyrosine-protein kinase receptor whose role is not yet clear. ,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. ROR subfamily. ,similarity:Contains 1 FZ (frizzled) domain. ,similarity:Contains 1 Ig-like C2-type (immunoglobulin-like) domain. ,similarity:Contains 1 kringle domain. ,similarity:Contains 1 protein kinase domain. ,tissue specificity:Expressed strongly in human heart , lung , and kidney , but weakly in the CNS. The short isoform is strongly expressed in fetal and adult CNS and in a variety of human cancers , including those originating from CNS or PNS neuroectoderm. ,
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