الوصف

Recombinant Human EGF

Catalog Number: TL***3

Gene Name Synonym: Epidermal Growth Factor, HOMG4, URG

Construction: A DNA sequence encoding the extracellular domain of human EGF (NP_*****4.2) was expressed with the C-terminal fused Fc region of human IgG1.

Source: Human

Expression Host: HEK**3 Cells

QC Testing Purity: > 95 % as determined by SDS-PAGE

Bio Activity: The ED *0 was determined by a cell proliferation assay using balb/c 3T3 cells is≤0.1 ng/ml, corresponding to a specific activity of ≥1 x *0 7 units/mg.

Endotoxin: < 0.*1 EU per μg of the protein as determined by the LAL method.

Molecular Mass: The Recombinant EGF consists of **4 amino acids and predicts a molecular mass of *3 KDa.

Formulation: Lyophilized from sterile PBS, pH 7.4. Normally 6 % - 8 % trehalose, mannitol are added as protectants before lyophilization.

Stability & Storage: Samples are stable for up to *4 months from date of receipt at 4 ℃.

Recommend to aliquot the protein into smaller quantities for optimal storage. Avoid repeated freeze-thaw cycles.

Protein Description

EGF is a potent growth factor that stimulates the proliferation of various epidermal and epithelial cells. Additionally, EGF has been shown to inhibit gastric secretion, and to be involved in wound healing. EGF signals through a receptor known as c-erbB, which is a class I tyrosine kinase receptor. As a low-molecularweight polypeptide, EGF was first purified from the mouse submandibular gland, but since then it was found in many human tissues including submandibular gland, parotid gland. It can also be found in human platelets, macrophages, urine, saliva, milk, and plasma. EGF is a growth factor that stimulates the growth of various epidermal and epithelial tissues in vivo and in vitro and of some fibroblasts in cell culture. It results in cellular proliferation, differentiation, and survival. Salivary EGF, which seems also regulated by dietary inorganic iodine, also plays an important physiological role in the maintenance of oro-esophageal and gastric tissue integrity. EGF acts by binding with high affinity to epidermal growth factor receptor on the cell surface and stimulating the intrinsic protein-tyrosine kinase activity of the receptor. The tyrosine kinase activity, in turn, initiates a signal transduction cascade that results in a variety of biochemical changes within the cell - a rise in intracellular calcium levels, increased glycolysis and protein synthesis, and increases in the expression of certain genes including the gene for EGFR - that ultimately lead to DNA synthesis and cell proliferation.

References

1. Chen JX, et al. (***1) Involvement of c-Src/STAT3 signal in EGFinduced proliferation of rat spermatogonial stem cells. Mol Cell Biochem.**8(**2):****3.
2. Guo Y, et al. (***2) Correlations among ERCC1, XPB,UBE2I, EGF, TAL2 and ILF3 revealed by gene signatures of histologicalsubtypes of patients with epithelial ovarian cancer. Oncol Rep. *7(1):*****2.
3. Kim S, et al. (***2) Smad7 acts as a negative regulator of the epidermal growth factor (EGF) signaling pathway in breast cancer cells. Cancer Lett. **4(2):*****4.

Trial dosage: A customer can apply for up to five samples a year (the actual trial dosage is determined by telephone or email communication).
Scope of use: Samples are limited to testing and research purposes.
Cost: Free for samples, customer is responsible for shipping and handling charges, reference cost is $*0 in the US, €*0 in the EU, and $*0 in other countries.
How to apply: You can apply by telephone or by email (the email application should specify the sample name, item number, contact person, telephone number, consignee address, etc.).