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8201
PhosphoPlus® p44/42 MAPK (Erk1/2) (Thr202/Tyr204) Antibody Duet

PhosphoPlus® p44/42 MAPK (Erk1/2) (Thr202/Tyr204) Antibody Duet #8201

Western Blotting Image 1

Western blot analysis of extracts from COS cells, untreated or treated with either U0126 #9903 (10 µM for 1h) or TPA #4174 (200 nM for 10 m), using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb #4370 and p44/42 MAPK (Erk1/2) (3A7) Mouse mAb #9107.

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Western Blotting Image 2

Western blot analysis of extracts from HeLa, NIH/3T3 and C6 cells, using p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb.

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Western Blotting Image 3

Western blot analysis of extracts from 293, NIH/3T3 and C6 cells, treated with λ phosphatase or TPA #4174 as indicated, using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb (upper), or p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb #4695 (lower).

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Western Blotting Image 4

Western blot analysis of extracts from Hek 293 cells, transfected with 100 nM SignalSilence® Control siRNA (Fluorescein Conjugate) #6201 (-) or SignalSilence® p44/42 MAPK (Erk1/2) siRNA (+), using p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb #4695 and α-Tubulin (11H10) Rabbit mAb #2125. The p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb confirms silencing of p44/42 expression and α-Tubulin (11H10) Rabbit mAb is used to control for loading and specificity of p44/42 MAPK (Erk1/2) siRNA.

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IHC-P (paraffin) Image 5

Immunohistochemical analysis of paraffin-embedded human breast carcinoma using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb.

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IHC-P (paraffin) Image 6

Immunohistochemical analysis of paraffin-embedded human breast carcinoma, showing cytoplasmic and nuclear localization, using p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb.

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IHC-P (paraffin) Image 7

Immunohistochemical analysis of paraffin-embedded human lung carcinoma, untreated (left) or λ phosphatase-treated (right), using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb.

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IHC-P (paraffin) Image 8

Immunohistochemical analysis of paraffin-embedded human colon carcinoma, using p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb.

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IHC-P (paraffin) Image 9

Immunohistochemical analysis using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb on SignalSlide™ Phospho-p44/42 MAPK (Thr202/Tyr204) IHC Controls #8103 (paraffin-embedded NIH/3T3 cells, treated with U0126 #9903 (left) or TPA #4174 (right).

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IHC-P (paraffin) Image 10

Immunohistochemical analysis of paraffin-embedded human breast carcinoma, using p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb in the presence of control peptide (left) or #1240 p44/42 MAPK (Erk1/2) Blocking Peptide (#4695 Specific) (right).

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Flow Cytometry Image 11

Flow cytometric analysis of Jurkat cells, U0126-treated (blue) or PMA-treated (green), using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb.

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Flow Cytometry Image 12

Flow cytometric analysis of Jurkat cells, U0126-treated (blue) or PMA-treated (green), using p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb compared to a nonspecific negative control antibody (red).

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IF-IC Image 13

Confocal immunofluorescent analysis of Drosophila egg chambers, untreated (top) or λ phosphatase-treated (bottom), using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb #4370 (green) and S6 Ribosomal Protein (54D2) Mouse mAb #2317 (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).

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IF-IC Image 14

Confocal immunofluorescent analysis of NIH/3T3 cells, treated with either U0126 (MEK1/2 Inhibitor) #9903 (left) or PDGF (right), using p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb (green). Actin filaments have been labeled with DY-554 phalloidin (red).

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IF-IC Image 15

Confocal immunofluorescent analysis of HT1080 cells, starved overnight then treated with U0126 #9903 (10 uM, 2 h; left) or PDBu (Phorbol 12,13-Dibutyrate) #12808 (100 nM, 15 m; right) using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb #4370 (green) and β-Actin (8H10D10) Mouse mAb #3700 (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).

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Product Includes Quantity Applications Reactivity MW(kDa) Isotype
Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb 4370 200 µl
  • WB
  • IP
  • IHC
  • IF
  • F
H M R Hm Mk Mi Dm Z B Dg Pg Sc 44, 42 Rabbit IgG
p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb 4695 200 µl
  • WB
  • IP
  • IHC
  • IF
  • F
H M R Hm Mk Mi Dm Z B Dg Pg Ce 42, 44 Rabbit IgG

PhosphoPlus® Duets from Cell Signaling Technology (CST) provide a means to assess protein activation status. Each Duet contains an activation-state and total protein antibody to your target of interest. These antibodies have been selected from CST's product offering based upon superior performance in specified applications.

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.

  1. Roux, P.P. and Blenis, J. (2004) Microbiol Mol Biol Rev 68, 320-44.
  2. Baccarini, M. (2005) FEBS Lett 579, 3271-7.
  3. Meloche, S. and Pouysségur, J. (2007) Oncogene 26, 3227-39.
  4. Roberts, P.J. and Der, C.J. (2007) Oncogene 26, 3291-310.
  5. Rubinfeld, H. and Seger, R. (2005) Mol Biotechnol 31, 151-74.
  6. Murphy, L.O. and Blenis, J. (2006) Trends Biochem Sci 31, 268-75.
  7. Dalby, K.N. et al. (1998) J Biol Chem 273, 1496-505.
  8. Marais, R. et al. (1993) Cell 73, 381-93.
  9. Kortenjann, M. et al. (1994) Mol Cell Biol 14, 4815-24.
  10. Owens, D.M. and Keyse, S.M. (2007) Oncogene 26, 3203-13.
Entrez-Gene Id
5595 , 5594
Swiss-Prot Acc.
P27361 , P28482
For Research Use Only. Not For Use In Diagnostic Procedures.

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
PhosphoPlus is a trademark of Cell Signaling Technology, Inc.
U.S. Patent No. 7,429,487, foreign equivalents, and child patents deriving therefrom.

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