7-plex T Cell Receptor Signaling kit - phosphoprotein is used to detect changes in phosphorylated CREB (Ser133), Erk/MAP kinase 1/2 (Thr185/Tyr187), and phosphorylated tyrosine residues on CD3 epsilon chain, Lck, ZAP-70, LAT, and Syk in T cell lysates using the Luminex® System. Although the protein kinase Syk is not part of the T Cell Receptor pathway, it does play a significant role in B Cell Receptor signaling and acts as a negative control for the analysis of T Cell Receptor signaling. The detection assay is a rapid, convenient alternative to Western Blotting and immunoprecipitation procedures. Each kit has sufficient reagents for 100 individual assays.