Cell Signaling Technology

Product Pathways - Lymphocyte Signaling

Phospho-Zap-70 (Tyr493)/Syk (Tyr526) Antibody #2704

Spleen tyrosine kinase   Zap   Zap70  

No. Size Price
2704S 100 µl ( 10 western blots ) ¥4,050.00 现货查询 购买询价 防伪查询
2704T 20 µl ( 2 western blots ) ¥1,500.00 现货查询 购买询价 防伪查询
2704 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 Human, Endogenous 70 Rabbit
IP 1:100

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting, IP=Immunoprecipitation,


Species predicted to react based on 100% sequence homology: Mouse, Rat,

Specificity / Sensitivity

Phospho-Zap-70 (Tyr493) Antibody detects endogenous levels of Zap-70 only when phosphorylated at Tyr493.

Phospho-Zap-70 (Tyr493) Antibody只能检测内源的在Tyr493位点磷酸化的Zap-70蛋白。

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Tyr493 of human Zap-70. Antibodies are purified by protein A and peptide affinity chromatography.

此多克隆抗体是通过合成人源对应的Zap-70 Tyr493位点周围的磷肽段来免疫动物而获得。抗体是通过protein A和多肽亲和层析法纯化。

Western Blotting

Western Blotting

Western blot analysis of extracts from Jurkat cells starved for 16 hours and treated with 2 mM H2O2 for 3 minutes, using Phospho-Zap-70 (Tyr493)/Syk (Tyr526) Antibody (upper) or control Zap-70 Antibody #2702 (lower).

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of Jurkat cells, untreated (blue) or CD3/CD28 treated (green), using Phospho-Zap-70 (Tyr493)/Syk (Tyr526) Antibody compared to a nonspecific negative control antibody (red).

Western Blotting

Western Blotting

Western blot analysis of extracts from Ramos cells untreated or treated with 10 µg/ml IgM for 2 minutes with or without calf intestinal phosphatase (CIP), using Phospho-Zap-70 (Tyr493)/Syk (Tyr526) Antibody (upper) or Syk Antibody #12358 (lower).


The Syk family protein tyrosine kinase Zap-70 is expressed in T and NK cells and plays a critical role in mediating T cell activation in response to T cell receptor (TCR) engagement (1). Following TCR engagement, Zap-70 is rapidly phosphorylated on several tyrosine residues through autophosphorylation and transphosphorylation by the Src family tyrosine kinase Lck (2-6). Tyrosine phosphorylation correlates with increased Zap-70 kinase activity and downstream signaling events. Expression of Zap-70 is correlated with disease progression and survival in patients with chronic lymphocytic leukemia (7,8).

Syk 家族酪氨酸激酶Zap-70 在T 细胞和 NK 细胞中表达并在响应T细胞受体(TCR)而介导T细胞激活中发挥了重要的作用(1)。在TCR 招募下, Zap-70 通过自磷酸化和Src家族酪氨酸激酶Lck转磷酸化作用下快速的磷酸化几个酪氨酸残基(2-6)。酪氨酸的磷酸化与Zap-70激酶活性的增加和下游信号传导有关系。Zap-70 的表达与疾病的进程和慢性淋巴白血病患者的生存率有关(7,8)。

Phosphorylation of Tyr493 within the activation loop results in enzymatic activation of Zap-70 (9).


  1. Chu, D.H. et al. (1998) Immunol Rev 165, 167-80.
  2. Iwashima, M. et al. (1994) Science 263, 1136-9.
  3. Neumeister, E.N. et al. (1995) Mol Cell Biol 15, 3171-8.
  4. Chan, A.C. et al. (1995) EMBO J 14, 2499-508.
  5. Williams, B.L. et al. (1999) EMBO J 18, 1832-44.
  6. Di Bartolo, V. et al. (1999) J Biol Chem 274, 6285-94.
  7. Wiestner, A. et al. (2003) Blood 101, 4944-51.
  8. Crespo, M. et al. (2003) N Engl J Med 348, 1764-75.
  9. Watts, J.D. et al. (1994) J. Biol. Chem. 269, 29520-29529.

Application References

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For Research Use Only. Not For Use In Diagnostic Procedures.

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.

Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.

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