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Flow cytometric analysis of Syk. Raji cells (1 x 10e6 cells/ml) were fixed and permeabilized using BD Cytofix/Cytoperm™ (30 minutes at room temperature). Cells were then stained (1 µg/ml for 1 hr at RT) with either a FITC-conjugated mouse Syk antibody (Cat. No. 552476) or a FITC conjugated mouse isotype control. Cells were washed and analyzed by flow cytometry.
BD Pharmingen™ FITC Mouse Anti-Human Syk
Regulatory Status Legend
Any use of products other than the permitted use without the express written authorization of Becton, Dickinson and Company is strictly prohibited.
Preparation And Storage
Recommended Assay Procedures
Additional applications: The purified format of clone 4D10 is useful in Western blot. Cat. No. 551816 or 551817 are recommended for this application.
Product Notices
- Since applications vary, each investigator should titrate the reagent to obtain optimal results.
- Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
- Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
Syk is a member of the family of non-receptor type protein-tyrosine kinases and plays a crucial role in lymphocyte signaling and development. Syk is expressed in all haematopoietic cells and contributes to the signal transduction process by binding to a tyrosine-based activation motif (ITAM) of immune receptors, including Igα, TCRζ, CD3ε, FcεRIβ, and FceRIγ. Upon receptor activation, Syk binds to phosphorylated ITAMs via its two N-terminal SH2 domains thereby activating Syk and causing tyrosines in Syk to undergo auto-phosphorylation or phosphorylation. These phosphorylated sites can act as binding sites for other signaling molecules or help to regulate enzymatic activity. For example, in mast cells, Syk can activate downstream targets such as phospholipase Cγ1 and VAV. Studies in Syk-/- mast cells identified defects in both the ERK-MAP and JNK-MAP kinase pathways. Syk migrates as 72 kDa in SDS/PAGE. (Predicted MW from SWISS-PROT is 72 kDa; Accession number P43405).
Development References (4)
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Chu DH, van Oers NS, Malissen M, Harris J, Elder M, Weiss A. Pre-T cell receptor signals are responsible for the down-regulation of Syk protein tyrosine kinase expression. J Immunol. 1999; 163(5):2610-2620. (Immunogen: Flow cytometry, Western blot). View Reference
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Costello PS, Turner M, Walters AE, et al. Critical role for the tyrosine kinase Syk in signalling through the high affinity IgE receptor of mast cells. Oncogene. 1996; 13(12):2595-2605. (Biology). View Reference
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Latour S, Veillette A. Proximal protein tyrosine kinases in immunoreceptor signaling. Curr Opin Immunol. 2001; 13:299-306. (Biology).
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Turner M, Schweighoffer E, Colucci F, Di Santo JP, Tybulewicz VL. Tyrosine kinase SYK; essential functions for immunoreceptor signaling. Immunol Today. 2000; 21:148-154. (Biology). View Reference
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Comparisons, where applicable, are made against older BD Technology, manual methods or are general performance claims. Comparisons are not made against non-BD technologies, unless otherwise noted.
For Research Use Only. Not for use in diagnostic or therapeutic procedures.