Abbreviation
Recombinant Human IL5 protein (Active)
Purity
Greater than 95% as determined by SDS-PAGE.
Endotoxin
Less than 1.0 EU/μg as determined by LAL method.
Activity
The ED50 as determined in a cell proliferation assay using TF‑1 human erythroleukemic cells is 0.1-0.5 ng/ml.
Alternative Names
B-cell differentiation factor I; Colony stimulating factor; EDF; Eosinophil differentiation factor; IL-5; IL5; IL5_HUMAN; Interleukin 5 (colony stimulating factor; eosinophil); Interleukin 5; Interleukin-5; T Cell Replacing Factor; T-cell replacing factor; TRF
Species
Homo sapiens (Human)
Expression Region
20-134aa
Target Protein Sequence
IPTEIPTSALVKETLALLSTHRTLLIANETLRIPVPVHKNHQLCTEEIFQGIGTLESQTVQGGTVERLFKNLSLIKKYIDGQKKKCGEERRRVNQFLDYLQEFLGVMNTEWIIES
Note: The complete
sequence may include tag sequence, target protein sequence, linker sequence and extra sequence that is
translated with the protein sequence for the purpose(s) of secretion, stability, solubility, etc.
If the exact amino acid sequence of this recombinant protein is critical to your application,
please explicitly request the full and complete sequence of this protein before ordering.
Protein Length
Full Length of Mature Protein
Tag Info
C-terminal 6xHis-tagged
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Buffer
Lyophilized from a 0.2 μm filtered 1xPBS, pH 7.4
Lead Time
Basically, we can dispatch the products out in 5-10 working days after receiving your orders. Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Notes
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Datasheet & COA
Please contact us to get it.
Description
IL-5 drives eosinophil differentiation, survival, and activation, making it a critical tool for dissecting JAK2/STAT5 signaling in allergic inflammation and hypereosinophilic disease models. This recombinant human IL-5, spanning the full mature sequence (aa 20–134) with a C-terminal 6xHis tag, demonstrates potent bioactivity with an ED50 of 0.1–0.5 ng/mL in TF-1 cell proliferation assays, confirming reliable performance in functional studies including eosinophil differentiation, immune cell activation, and antibody validation workflows such as ELISA standard curves or blocking assays. Mammalian expression preserves native folding and post-translational modifications essential for receptor engagement, while endotoxin levels below 1.0 EU/μg eliminate LPS-driven artifacts that confound cytokine-specific readouts in sensitive immune cell cultures. Purity exceeding 95% by SDS-PAGE, combined with this stringent endotoxin control, supports use in in vivo inflammation models and as a reference standard in cytokine detection platforms.