FastScan™ Phospho-p44/42 MAPK (Thr202/Tyr204) ELISA Kit #42173
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Supporting Data
| REACTIVITY | H M R Mk |
Species Cross-Reactivity Key:
- H-Human
- M-Mouse
- R-Rat
- Mk-Monkey
Product Information
Product Description
*Antibodies in this kit are custom formulations specific to kit.
Protocol
Specificity / Sensitivity
The FastScan™ Phospho-p44/42 MAPK (Thr202/Tyr204) ELISA Kit detects endogenous levels of p44/42 MAPK when phosphorylated at Thr202/Tyr204, as shown in Figure 1. This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species.
Species Reactivity:
Human, Mouse, Rat, Monkey
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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