Recombinant Human FGF-20 protein(His Tag) (PKSH034160)
For research use only.
| Synonyms | FGFK |
| Species | Human |
| Expression Host | E.coli |
| Sequence | Pro 3-Thr 211 |
| Accession | Q9NP95 |
| Calculated Molecular Weight | 24.2 kDa |
| Observed Molecular Weight | 24 kDa |
| Tag | C-His |
| Bio-activity | Measure by its ability to induce 3T3 cells proliferation.The ED50 for this effect is 1.3-3.2 ng/mL.The specific activity of recombinant human FGF-20 is > 2 x 105 IU/mg. |
| Purity | > 98 % as determined by reducing SDS-PAGE. |
| Endotoxin | < 0.1 EU per μg of the protein as determined by the LAL method. |
| Storage | Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months. |
| Shipping | This product is provided as lyophilized powder which is shipped with ice packs. |
| Formulation |
Lyophilized from sterile PBS,pH 8.0. Normally 5% - 8% trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization. Please refer to the specific buffer information in the printed manual. |
| Reconstitution | Please refer to the printed manual for detailed information. |
| Background | Fibroblast growth factor 20 (FGF-20) is a member of the FGF gene family, which currently contains 22 members. Based on its structure, it is further classified as an FGF-9 subfamily member. All FGF family members are heparin-binding growth factors with a 120 amino acid (aa) core FGF domain that exhibits a beta -trefoil structure. The cDNA of FGF-20 predicts a 211 aa polypeptide without a canonical signal peptide sequence, a feature shared with other members of this subfamily. Nevertheless, it is secreted with a molecular weight of 27 kDa. FGF-20 is known to bind to heparin. No alternate splice forms have been reported. However, three amino acid polymorphisms are known, and single nucleotide polymorphisms in noncoding regions that may effect expression show a strong correlation with a risk of developing Parkinson’s disease. Human FGF-20 shows 98% aa identity to bovine FGF-20 and 95% aa identity to both rat and mouse FGF-20. Within the FGF-9 subfamily, FGF-20 is 69% and 63% aa identical to human FGF-9 and FGF-16, respectively. Human FGF-20 is reported to be promiscuous in its selection of receptors which include FGF R1c, FGF R2c, FGF R3b, FGF R3c and FGF R4. FGF-20 is expressed a variety of cells, including dopaminergic neurons, fibroblasts, keratinocytes and breast epithelium, and multiple sites in the fetus. Finally, the expression of FGF-20 and DKK-1 is regulated by beta -catenin during development and tumorigenesis, implying that FGF-20 may play a role in the oncogenesis induced by the Wnt signaling pathway. |
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