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p44/42 MAPK (Erk1/2) (L34F12) Mouse mAb #4696

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    Supporting Data

    REACTIVITY H M R Mk Mi Z B Pg
    SENSITIVITY Endogenous
    MW (kDa) 42, 44
    Source/Isotype Mouse IgG1
    Application Key:
    • WB-Western Blotting 
    • IHC-Immunohistochemistry 
    • IF-Immunofluorescence 
    Species Cross-Reactivity Key:
    • H-Human 
    • M-Mouse 
    • R-Rat 
    • Mk-Monkey 
    • Mi-Mink 
    • Z-Zebrafish 
    • B-Bovine 
    • Pg-Pig 

    Product Information

    Product Usage Information

    Application Dilution
    Western Blotting 1:2000
    Fluorescent Western 1:2000
    Immunohistochemistry (Paraffin) 1:250 - 1:1000
    Immunofluorescence (Immunocytochemistry) 1:100

    Storage

    Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

    For a carrier free (BSA and azide free) version of this product see product #78241.

    Protocol

    Specificity / Sensitivity

    p44/42 MAP Kinase (L34F12) Mouse mAb detects endogenous levels of total p44/42 MAP kinase (Erk1/Erk2) protein. In some systems this antibody may recognize p42/Erk2 more readily than p44/Erk1. The antibody does not cross-react with JNK/SAPK or p38 MAP kinase.

    Species Reactivity:

    Human, Mouse, Rat, Monkey, Mink, Zebrafish, Bovine, Pig

    Source / Purification

    Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to the sequence of p42 MAP Kinase.

    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.

    Alternate Names

    ERK; ERK1; ERK2; MAPK; p42; p44

    For Research Use Only. Not for Use in Diagnostic Procedures.
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