Tnk1 is a nonreceptor tyrosine kinase. These kinases, like members of the SRC and JAK families, mediate intracellular signaling downstream of receptor activation. Tnk1 is a ubiquitously expressed 47-kDa protein with autotyrosine kinase activity that is developmentally regulated during embryogenesis. Tnk1 is also upregulated following IL3 withdrawal from factor-dependent murine NSF/N1. H7 cells that undergo apoptosis, suggesting a role in growth inhibition. Synonyms: Monoclonal Tnk1 antibody, Anti-Tnk1 antibody, Tyrosine kinase non receptor 1 antibody, NRPTK antibody.