Recombinant Human IL-4
Cat# 100-09-5UG
Size : 5ug
Brand : FUJIFILM
Recombinant Human IL-4
Interleukin 4 (IL-4) is an immunomodulatory cytokine that functions to induce naïve helper T cells to differentiate into type 2 T helper (Th2) cells. Th2 cells subsequently produce more IL-4 in a positive feedback loop. IL-4 also promotes immunoglobulin IgG to IgE isotype switching on B cells. IL-4 binds the IL-4Rα receptor to activate STAT6 signaling.
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Instructions
Centrifuge vial before opening. Suspend the product by gently pipetting the above recommended solution down the sides of the vial. DO NOT VORTEX. Allow several minutes for complete reconstitution. For prolonged storage, dilute to working aliquots in a 0.1% BSA solution, store at -80°C and avoid repeat freeze thaws.
Technical Specifications
| Alternate Names | B-cell stimulatory factor-1, BSF-1, BCDF, BCGF |
| Accession Number | P05112 |
| Source | Genetically modified E.coli |
| Predicted Molecular Mass | Monomer, 15.1 kDa (130 aa) |
| AA Sequence | MHKCDITLQE IIKTLNSLTE QKTLCTELTV TDIFAASKNT TEKETFCRAA TVLRQFYSHH EKDTRCLGAT AQQFHRHKQL IRFLKRLDRN LWGLAGLNSC PVKEANQSTL ENFLERLKTI MREKYSKCSS |
| Formulation | Lyophilized from a 0.2 µm filtered solution containing 0.1% Trifluoroacetic Acid (TFA) |
| Product Reconstitution | Sterile water at 0.1 mg/mL |
| Country of Origin | USA |
| Specification* | Method of Determination | Acceptance Criteria |
| Purity | Reducing and Non-Reducing SDS PAGE | ≥ 95% |
| Endotoxin | Kinetic LAL | ≤ 0.1 EU/µg |
| Biological Activity (ED50) | TF-1 cell proliferation | ≤ 0.25 ng/mL; ≥ 4.0 x 106 units/mg |
*Lot-specific values for the above specifications are supplied with each product on its corresponding COA. The values provided here are minimum expected values to pass internal requirements.