JNK Mouse, PE, Clone: N9-66, BD

The N9-66 monoclonal antibody specifically binds to JNK1 and JNK2 phosphorylated at the pT183/pY185 sites. c-Jun NH2-terminal Kinases (JNKs), also called Stress Activated Protein Kinases (SAPKs), are mitogen-activated protein kinases (MAPKs) with observed molecular weights of ∽46 kDa (JNK1) and ∽54 kDa (JNK2). Along with the p38 and ERK families, JNK represents one of three major classes of MAPKs. Complete activation of JNK requires the phosphorylation of both Thr183 and Tyr185 that are located in a Thr-X-Tyr motif. Phosphorylation of these residues is carried out by MKK4 and MKK7 that are phosphorylated and activated by MEKKs and MLKs in response to stress signals delivered through small GTPases of the Rho family. Once activated, JNK can translocate into the nucleus and regulate the expression of genes through phosphorylation of c-Jun, ATF-2, and other transcription factors. JNK plays a role in signal transduction in response to cytokines and various forms of environmental stress, such as endotoxins, UV irradiation, heat, and hyperosmolarity. JNK is critical to the regulation of cell growth, apoptosis, and the cellular response to stress, making it an important factor in tumorigenesis and adaptive immunity. During antibody development, the N9-66 monoclonal antibody was found to detect phosphorylated JNK1/2 by Western blot analysis of cellular lysates and by immunofluorescent staining and flow cytometric analysis of fixed and permeabilized cells. This antibody crossreacts with phosphorylated JNK1/2 expressed by mouse cells, as tested by Western blot analysis and flow cytometry.