Recombinant Porcine IL-4
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Description
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.
Activity Assay
Porcine IL-4 is fully biologically active when compared to standard. The activity is determined by the dose dependent proliferation of TF-1 cells and it is typically less than 2 ng/ml. This corresponds to an expected specific activity of 1.7 x 104 units/mg
AA Sequence
MHKCDITLQE IIKTLNILTA RKNSCMELPV TDVFAAPENT TEKETFCRAS TVLRHIYRHH TCMKSLLSGL DRNLSSMANM TCSVHEAKKS TLKDFLERLK TIMKEKYSKC
Alternative Names
B-cell stimulatory factor-1, BSF-1, BCDF, BCGF
| Product Details | |
|---|---|
| Length |
110 aa |
| Molecular Weight |
12.7 kDa |
| Structure |
Monomer |
| Source |
E. coli |
| Accession Number |
Q04745 |
| Purity |
≥95% determined by reducing and non-reducing SDS-PAGE |
| Endotoxin Level |
≤0.1 EU/µg as measured by kinetic LAL |
| Formulation |
Lyophilized from a 0.2 µm filtered solution containing 10 mM sodium phosphate, pH 7.5 |
| Reconstitution |
Centrifuge vial before opening. When reconstituting the product, gently pipet and wash down the sides of the vial to ensure full recovery of the protein into solution. It is recommended to reconstitute the lyophilized product with sterile water at 0.1 mg/ml, which can be further diluted into other aqueous solutions. If a precipitate is observed, centrifuge the solution thoroughly and use only the soluble fraction (removing it from the precipitate). A 10% overfill has been added to compensate for any loss of protein in the precipitate. |
| Stability and Storage |
12 months from date of receipt when stored at -20°C to -80°C as supplied. 1 month when stored at 4°C after reconstituting as directed. 3 months when stored at -20°C to -80°C after reconstituting as directed. |
