Abbreviation
Recombinant Human IL9 protein (Active)
Purity
>95% as determined by SDS-PAGE.
Endotoxin
Less than 1.0 EU/μg as determined by LAL method.
Activity
Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using human MO7e cells is less than 0.2 ng/ml, corresponding to a specific activity of >5.0x106 IU/mg.
Alternative Names
Cytokine P40; Homolog of mouse T cell and mast cell growth factor 40; HP40; IL 9; IL-9; Il9; IL9_HUMAN; Interleukin 9; Interleukin-9; Mast cell growth factor; MCGF; Megakaryoblast growth factor; P40; p40 cytokine; p40 T cell and mast cell growth factor ; T cell growth factor 3 ; T cell growth factor p40 ; T-cell growth factor P40; TCGF 3
Species
Homo sapiens (Human)
Expression Region
19-144aa
Target Protein Sequence
QGCPTLAGIL DINFLINKMQ EDPASKCHCS ANVTSCLCLG IPSDNCTRPC FSERLSQMTN TTMQTRYPLI FSRVKKSVEV LKNNKCPYFS CEQPCNQTTA GNALTFLKSL LEIFQKEKMR GMRGKI
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
Tag-Free
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 PBS, pH 7.4
Lead Time
5-10 business days
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-9 drives T-cell and mast cell proliferation through JAK/STAT signaling, making it a critical tool for dissecting type 2 immune responses and allergic inflammation. This tag-free recombinant human IL-9, encompassing the full mature sequence (residues 19–144), demonstrates an ED50 below 0.2 ng/mL in MO7e proliferation assays—corresponding to a specific activity exceeding 5.0 × 10⁶ IU/mg—which supports use in cell-based functional assays including T-cell proliferation, mast cell differentiation, and JAK/STAT pathway activation studies. Endotoxin levels below 1.0 EU/μg minimize LPS-driven artifacts in sensitive immune cell cultures and provide a suitable basis for in vivo models of allergic airway inflammation or tumor biology. The combination of >95% purity by SDS-PAGE and verified sequence fidelity also makes this protein appropriate as a reference standard in cytokine detection assays or as a positive control for antibody validation by ELISA.