MAP Kinase p44/42 (MAPK3/MAPK1,Mitogen-activated Protein Kinase 1,MAP Kinase 1,MAPK 1,ERT1,Extracellular Signal-regulated Kinase 2,ERK-2,MAP Kinase Isoform p42,p42-MAPK,Mitogen-activated Protein Kinase 2,MAP Kinase 2,MAP

Antibodies / Antibodies-Protein Kinases

4°C Do Not Freeze

Supplied as a liquid in PBS, pH 7.2, 2mg/ml BSA, <0.09% sodium azide. Labeled with Alexa Fluor® 647.

A synthetic peptide (KLH-coupled) corresponding to residues near the carboxy terminus of rat p44 MAP kinase.

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 is 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.

Applications:
Suitable for use in Flow Cytometry. Other applications not tested.

Recommended Dilution:
Flow Cytometry: 1:50.
Optimal dilutions to be determined by the researcher.

Storage and Stability:
May be stored at 4°C before opening. DO NOT FREEZE! Stable at 4°C as an undiluted liquid. Dilute only prior to immediate use. Stable for 12 months at 4°C. Freezing Alexa Fluor® conjugates will result in a substantial loss of activity. Alexa Fluor® conjugates are sensitive to light.