Cell Signaling Technology

Product Pathways - MAPK Signaling

Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb #4377

ERK   ERK1   ERK2   mapk   p42   p44   p44/42   phospho erk   pmapk   rabbit monoclonal   sc-16982   sc-7976  

No. Size Price
4377S 200 µl ( 20 western blots ) ¥3,960.00 现货查询 购买询价 防伪查询
4377T 20 µl ( 2 western blots ) ¥1,500.00 现货查询 购买询价 防伪查询
4377 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 Human,Mouse,Rat,Monkey,Mink,D. melanogaster,Zebrafish,Pig, Endogenous 42, 44 Rabbit IgG
F 1:200
IF-IC 1:200

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting, F=Flow Cytometry, IF-IC=Immunofluorescence (Immunocytochemistry),

Specificity / Sensitivity

Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb detects endogenous levels of p44 and p42 MAP Kinase (Erk1 and Erk2) when dually phosphorylated at Thr202 and Tyr204 of Erk1 (Thr185 and Tyr187 of Erk2), and singly phosphorylated at Tyr204. The antibody does not cross-react with the corresponding phosphorylated residues of either JNK/SAPK or p38 MAP kinase.

Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb兔单抗能够检测内源性的Thr202和Tyr204被双重磷酸化的Erk1(Thr185和 Tyr187双重磷酸化的Erk2),以及Tyr204被单独磷酸化的p44和p42 MAPK(Erk1和Erk2)蛋白。该抗体与JNK/SAPK或p38 MAPK的相应磷酸化残基没有交叉反应。

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Thr202/Tyr204 of human p44 MAP kinase.

该单克隆抗体是采用合成的与人源p44 MAPK的Thr202/Tyr204位点周围残基相一致的磷酸化肽段免疫动物而产生的。

Western Blotting

Western Blotting

Western blot analysis of purified MAPK phospho-proteins or extracts from NIH/3T3 cells treated with UV light and PDGF, using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb (upper), Phospho-p38 MAPK (Thr180/Tyr182) (3D7) Rabbit mAb #9215 (middle), and Phospho-SAPK/JNK (Thr183/Tyr185) (98F2) Rabbit mAb #4671 (lower).

western blot方法检测细胞提取物:UV、PDGF处理的NIH/3T3细胞和纯化的MAPK磷酸化蛋白,使用的抗体是Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb 兔单抗(上图), Phospho-p38 MAPK (Thr180/Tyr182) (3D7) Rabbit mAb #9215兔单抗 (中图)和Phospho-SAPK/JNK (Thr183/Tyr185) (98F2) Rabbit mAb #4671兔单抗 (下图)。

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of U0126-inhibited (blue) or PMA-stimulated (green) Jurkat cells, using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb compared to a nonspecific negative control antibody (red).

流式方法检测细胞提取物:U0126抑制的(蓝色)、PMA刺激的(绿色)Jurkat细胞,使用的抗体是Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb兔单抗,红色曲线表示采用非特异性阴性对照的结果。



Confocal immunofluorescent images of NIH/3T3 cells untreated (left), inhibited with U0126 (MEK1/2 Inhibitor) #9903 (center), or stimulated with Platelet-Derived Growth Factor (PDGF) #9909 (right) and labeled with Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb (green). Actin filaments have been labeled with Alexa Fluor® 555 phalloidin (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).

激光共聚焦荧光法检测胰岛素处理的NIH/3T3细胞,左侧细胞未经处理,中间细胞用U0126 (MEK1/2 抑制子) #9903抑制,右侧细胞用血小板衍生生长因子(PDGF)#9909刺激,并用Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb兔单抗标记(呈绿色)。肌动蛋白纤维丝用Alexa Fluor® 555鬼笔环肽标记(呈红色)。蓝色伪彩为DNA荧光染料(产品信息为 DRAQ5®#4084)。



Confocal immunofluorescent analysis of HT-1080 cells, starved overnight then treated with U0126 #9903 (10 μM, 2 hr; left) or PDBu (Phorbol 12,13-Dibutyrate) #12808 (100 nM, 15 min; right) using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (197G2) Rabbit mAb #4377 (green) and β-Actin (8H10D10) Mouse mAb #3700 (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).


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.

丝裂原活化蛋白激酶(MAPKs)是一个具有广泛保守性的丝氨酸/苏氨酸蛋白激酶家族,在许多细胞过程中起作用,比如细胞增殖、分化、运动和死亡。p44/42 MAPK (Erk1/2)信号转导通路能在应答各种胞外刺激后被激活,这些刺激因子包括有丝分裂原、生长因子和细胞因子(1-3),并且被研究者认为是诊断和治疗癌症的重要靶点(4)。受到刺激后,三个不同层次的蛋白激酶级联反应就连续被开启,这三个层次的分子包含MAPKKK(MAP3K)、MAPKK(MAP2K)、MAPK。多种p44/42 MAP3Ks已经被鉴定出来,包括Raf家族成员,以及Mos、Tpl2/Cot。MEK1、MEK2是该通路中主要的MAPKKs(5,6)。MEK1、MEK2通过分别磷酸化p44和p42蛋白的活化环内的Thr202/Tyr204位点和Thr185位点/Tyr187位点,从而激活p44、p42。目前已经鉴定出p44/42的一些下游靶点,包括p90RSK (7) 和下游转录因子Elk-1 (8,9)。双特异性(Thr/Tyr) MAPK磷酸酶家族成员DUSPs、MKPs (10),以及MEK抑制子如U0126、 PD98059,可以负调节p44/42。

  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.

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For Research Use Only. Not For Use In Diagnostic Procedures.

U.S. Patent No. 5,675,063.

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Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.

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