Immunohistochemical staining of formalin fixed and paraffin embedded human tonsil tissue section using ZAP70 monoclonal antibody clone RM408 at a 1:200 dilution.
This gene encodes an enzyme belonging to the protein tyrosine kinase family, and it plays a role in T-cell development and lymphocyte activation. This enzyme, which is phosphorylated on tyrosine residues upon T-cell antigen receptor (TCR) stimulation, functions in the initial step of TCR-mediated signal transduction in combination with the Src family kinases, Lck and Fyn. This enzyme is also essential for thymocyte development. Mutations in this gene cause selective T-cell defect, a severe combined immunodeficiency disease characterized by a selective absence of CD8-positive T-cells. Two transcript variants that encode different isoforms have been found for this gene. [provided by RefSeq
Other Designations:
syk-related tyrosine kinase,zeta-chain (TCR) associated protein kinase (70 kD),zeta-chain associated protein kinase 70kDa,zeta-chain associated protein kinase, 70kD