Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) Blocking Peptide #1150
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Important Ordering Details
Custom Ordering Details: This product is assembled upon order. Please allow two-four weeks for your product to be processed.Product Information
Product Usage Information
Use as a blocking reagent to evaluate the specificity of antibody reactivity in dot blot protocols.
Storage
Product Description
Quality Control
The quality of the peptide was evaluated by reversed-phase HPLC and by mass spectrometry. The peptide reacts with Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) Rabbit mAb #4370 in dot blot.
Background
Mitogen-activated protein kinases (MAPKs) are a widely conserved family of serine/threonine protein kinases involved in many cellular programs, such as cell proliferation, differentiation, motility, and death. The p44/42 MAPK (Erk1/2) signaling pathway can be activated in response to a diverse range of extracellular stimuli, including mitogens, growth factors, and cytokines (1-3), and research investigators consider it an important target in the diagnosis and treatment of cancer (4). Upon stimulation, a sequential three-part protein kinase cascade is initiated, consisting of a MAP kinase kinase kinase (MAPKKK or MAP3K), a MAP kinase kinase (MAPKK or MAP2K), and a MAP kinase (MAPK). Multiple p44/42 MAP3Ks have been identified, including members of the Raf family, as well as Mos and Tpl2/COT. MEK1 and MEK2 are the primary MAPKKs in this pathway (5,6). MEK1 and MEK2 activate p44 and p42 through phosphorylation of activation loop residues Thr202/Tyr204 and Thr185/Tyr187, respectively. Several downstream targets of p44/42 have been identified, including p90RSK (7) and the transcription factor Elk-1 (8,9). p44/42 are negatively regulated by a family of dual-specificity (Thr/Tyr) MAPK phosphatases, known as DUSPs or MKPs (10), along with MEK inhibitors, such as U0126 and PD98059.
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- Roberts, P.J. and Der, C.J. (2007) Oncogene 26, 3291-310.
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