Cell Signaling Technology

Product Pathways - Growth Factors/Cytokines

Mouse Epidermal Growth Factor (mEGF) #5331

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Source

Recombinant mouse EGF (mEGF) Asn977-Arg1029 (Accession #NP_034243) was produced in E. coli at Cell Signaling Technology.

Molecular Characterization

Recombinant mEGF has a Met on the amino terminus and has a calculated MW of 6045. DTT-reduced and non-reduced protein migrate as 6 kDa polypeptides. The expected amino-terminal MNSYP of recombinant mEGF was verified by amino acid sequencing.

Purity

>98% as determined by SDS-PAGE of 6 μg reduced (+) and non-reduced (-) recombinant mEGF. All lots are greater than 98% pure.

Bioactivity

The bioactivity of recombinant mEGF was determined in an NIH/3T3 cell proliferation assay. The ED50 of each lot is between 40-250 pg/ml.

Coomassie Gel

Coomassie Gel

The purity of recombinant mEGF was determined by SDS-PAGE of 6 µg reduced (+) and non-reduced (-) recombinant mEGF and staining overnight with Coomassie Blue.

Bioactivity

Bioactivity

The proliferation of NIH/3T3 cells treated with increasing concentrations of mEGF was assessed. After 24 hr treatment, cells were labeled with BrdU for 4 hr. BrdU incorporation was determined using the BrdU Cell Proliferation Assay Kit #6813 and the OD450 was determined.

Western Blotting

Western Blotting

Western blot analysis of extracts from NIH/3T3 cells, untreated or treated with mEGF for 10 minutes, using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (D13.14.4E) XP® Rabbit mAb #4370 (upper) or p44/42 MAPK (Erk1/2) (137F5) Rabbit mAb #4695 (lower).


Endotoxin

Less than 0.01 ng endotoxin/1 μg mEGF.

Formulation

With carrier: Lyophilized from a 0.22 μm filtered solution of 20 mM citrate, pH 3.0 containing 100 mM NaCl and 20 μg BSA per 1 μg mEGF. Carrier free: Lyophilized from a 0.22 μm filtered solution of 20 mM citrate, pH 3.0 containing 100 mM NaCl.

Background

EGF is produced by epithelial cells, fibroblasts, and many other cell types (1,2). Low molecular weight soluble EGF is generated through proteolysis of a larger ~130,000 molecular weight transmembrane precursor (1,2). Both soluble and membrane forms of EGF are active (2). EGF induces proliferation, differentiation, and survival of many cell types including tumor-derived cells (1-3). There are multiple members of the EGF family and multiple members of the ErbB/HER EGF receptor family. EGF binds to ErbB1/HER1 and induces homodimerization or induces heterodimerization with other ErbB/HER members (1).  Binding of EGF signals through the MAPK, PI3K/Akt, and Stat5 pathways (1). EGF, EGF family members, EGF receptors, and their signaling pathways are involved in many cancers and are targets for therapeutic intervention (1, 2).

  1. Citri, A. and Yarden, Y. (2006) Nat Rev Mol Cell Biol 7, 505-16.
  2. Higashiyama, S. et al. (2008) Cancer Sci 99, 214-20.
  3. Xian, C.J. (2007) Endocr Rev 28, 284-96.

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Companion Products

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

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