ZAP-70 (Zeta-chain-associated protein kinase 70) is a protein normally expressed near the surface membrane of lymphocytes (T cells, natural killer cells, and a subset of B cells). It is most prominently known to be recruited upon antigen binding to the T cell receptor (TCR), and it plays a critical role in T cell signaling. ZAP-70 was initially discovered in TCR-stimulated Jurkat cells, an immortal line of human T lymphocytes, in 1991. Its molecular weight is 70 kDa, and it is a member of the protein-tyrosine kinase family and is a close homolog of SYK. SYK and ZAP70 share a common evolutionary origin and split from a common ancestor in the jawed vertebrates. The importance of ZAP-70 in T cell activation was determined when comparing ZAP-70 expression in patients with SCID (severe combined immunodeficiency). ZAP-70 deficient individuals were found to have no functioning T cells in their peripheral blood, suggesting that ZAP-70 is a critical component of T cell activation and development. ZAP-70 expression in B cells is correlated with the development of chronic lymphocytic leukemia (CLL).

Tyrosine-protein kinase ZAP-70
70 kDa zeta-chain associated protein
Syk-related tyrosine kinase
ZAP70
SRK

p43403

WB,IHC,IF,ICC,FC

WB 1:2000
IHC 1:1000
IF 1:100-1:400
ICC 1:500
FC 1:1000

Human,Mouse,Rat

Rabbit

Predicted size: 70 kDa

Cytoplasm. Cell membrane.

Recombinant Rabbit monoclonal

IgG

Protein A affinity purified.

Liquid

PBS (pH7.4), 0.1% BSA, 40% Glycerol. Preservative: 0.05% Sodium Azide.

Store at +4°C short term. Store at -20°C long term. Avoid freeze / thaw cycle.