Enables several functions, including immunoglobulin receptor binding activity; non-membrane spanning protein tyrosine kinase activity; and phosphotyrosine residue binding activity. Involved in several processes, including integrin-mediated signaling pathway; negative regulation of natural killer cell activation; and regulation of vesicle-mediated transport. Acts upstream of or within bone mineralization and skeletal system morphogenesis. Located in plasma membrane. Colocalizes with actin cytoskeleton and ruffle membrane. Is expressed in 2-cell stage embryo; blastocyst; metanephros; nervous system; and neural ectoderm. Orthologous to human FGR (FGR proto-oncogene, Src family tyrosine kinase).
