Your journey to publication continues here Discover why


Anti-MEK1 + MEK2 (phospho S218 + S222 + S226) antibody [UP42] (ab78132)


  • Product nameAnti-MEK1 + MEK2 (phospho S218 + S222 + S226) antibody [UP42]
    See all MEK1 + MEK2 primary antibodies
  • Description
    Rabbit monoclonal [UP42] to MEK1 + MEK2 (phospho S218 + S222 + S226)
  • SpecificityRecognizes phosphorylated MEK1(Ser218/222) + MEK2 (Ser222/226)
  • Tested applicationsWBmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen

    Synthetic peptide:


    conjugated to KLH, corresponding to amino acids 217-223 of Human MEK1 + MEK2. The immunizing sequence is highly conserved.

  • Positive control
    • RIPA lysates from PC-12 cells


  • FormLiquid
  • Storage instructionsShipped at 4°C. Upon delivery aliquot and store at -20°C. Avoid freeze / thaw cycles.
  • Storage bufferPreservative: 0.05% Sodium Azide
    Constituents: 30% Glycerol, 0.15M Sodium chloride, 0.1M Tris glycine, pH 7.4
  • Concentration information loading...
  • PurityProtein A purified
  • ClonalityMonoclonal
  • Clone numberUP42
  • IsotypeIgG
  • Research areas


Our Abpromise guarantee covers the use of ab78132 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB 1/2000 - 1/10000. Detects a band of approximately 50 kDa (predicted molecular weight: 44 kDa).


  • FunctionDual specificity protein kinase which acts as an essential component of the MAP kinase signal transduction pathway. Binding of extracellular ligands such as growth factors, cytokines and hormones to their cell-surface receptors activates RAS and this initiates RAF1 activation. RAF1 then further activates the dual-specificity protein kinases MAP2K1/MEK1 and MAP2K2/MEK2. Both MAP2K1/MEK1 and MAP2K2/MEK2 function specifically in the MAPK/ERK cascade, and catalyze the concomitant phosphorylation of a threonine and a tyrosine residue in a Thr-Glu-Tyr sequence located in the extracellular signal-regulated kinases MAPK3/ERK1 and MAPK1/ERK2, leading to their activation and further transduction of the signal within the MAPK/ERK cascade. Depending on the cellular context, this pathway mediates diverse biological functions such as cell growth, adhesion, survival and differentiation, predominantly through the regulation of transcription, metabolism and cytoskeletal rearrangements. One target of the MAPK/ERK cascade is peroxisome proliferator-activated receptor gamma (PPARG), a nuclear receptor that promotes differentiation and apoptosis. MAP2K1/MEK1 has been shown to export PPARG from the nucleus. The MAPK/ERK cascade is also involved in the regulation of endosomal dynamics, including lysosome processing and endosome cycling through the perinuclear recycling compartment (PNRC), as well as in the fragmentation of the Golgi apparatus during mitosis.
  • Tissue specificityWidely expressed, with extremely low levels in brain.
  • Involvement in diseaseCardiofaciocutaneous syndrome 3
  • Sequence similaritiesBelongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. MAP kinase kinase subfamily.
    Contains 1 protein kinase domain.
  • DomainThe proline-rich region localized between residues 270 and 307 is important for binding to RAF1 and activation of MAP2K1/MEK1.
  • Post-translational
    Phosphorylation at Ser-218 and Ser-222 by MAP kinase kinase kinases (RAF or MEKK1) positively regulates kinase activity. Also phosphorylated at Thr-292 by MAPK1/ERK2 and at Ser-298 by PAK. MAPK1/ERK2 phosphorylation of Thr-292 occurs in response to cellular adhesion and leads to inhibition of Ser-298 phosphorylation by PAK.
    Acetylation by Yersinia yopJ prevents phosphorylation and activation, thus blocking the MAPK signaling pathway.
  • Cellular localizationCytoplasm, cytoskeleton, microtubule organizing center, centrosome. Cytoplasm, cytoskeleton, microtubule organizing center, spindle pole body. Cytoplasm. Nucleus. Localizes at centrosomes during prometaphase, midzone during anaphase and midbody during telophase/cytokinesis.
  • Information by UniProt
  • Database links
  • Alternative names
    • AA589381 antibody
    • Dual specificity mitogen-activated protein kinase kinase 1 antibody
    • Dual specificity mitogen-activated protein kinase kinase 2 antibody
    • EC antibody
    • ERK activator kinase 1 antibody
    • ERK activator kinase 2 antibody
    • FLJ26075 antibody
    • MAP kinase kinase 1 antibody
    • MAP kinase kinase 2 antibody
    • MAP2K1 antibody
    • MAP2K2 antibody
    • MAPK/ERK kinase 1 antibody
    • MAPK/ERK kinase 2 antibody
    • MAPKK 1 antibody
    • MAPKK1 antibody
    • MAPKK2 antibody
    • MEK 1 antibody
    • MEKK1 antibody
    • Mitogen activated protein kinase kinase 1 antibody
    • Mitogen activated protein kinase kinase 2 antibody
    • Mitogen-activated protein kinase kinase 2, p45 antibody
    • MK2 antibody
    • MKK 1 antibody
    • MKK 2 antibody
    • MKK1 antibody
    • MKK2 antibody
    • MP2K1_HUMAN antibody
    • PRKMK 1 antibody
    • PRKMK 2 antibody
    • Prkmk1 antibody
    • Prkmk2 antibody
    • protein kinase, mitogen-activated, kinase 1 (MAP kinase kinase 1) antibody
    • Protein kinase, mitogen-activated, kinase 1 antibody
    • Protein kinase, mitogen-activated, kinase 2 antibody
    see all

Anti-MEK1 + MEK2 (phospho S218 + S222 + S226) antibody [UP42] images

  • All lanes : Anti-MEK1 + MEK2 (phospho S218 + S222 + S226) antibody [UP42] (ab78132) at 1/5000 dilution

    Lane 1 : PC-12 cell lysate
    Lane 2 : PC-12 cell lysate treated with 5 Units of B-Raf for 30 minutes at 30°C.

    HRP-goat anti-rabbit secondary at 1/5000 dilution

    Predicted band size : 44 kDa
    Observed band size : 50 kDa (why is the actual band size different from the predicted?)

References for Anti-MEK1 + MEK2 (phospho S218 + S222 + S226) antibody [UP42] (ab78132)

ab78132 has not yet been referenced specifically in any publications.

Product Wall

There are currently no Abreviews or Questions for ab78132.
Please use the links above to contact us or submit feedback about this product.