| Code | CSB-AP001781HU |
| Abbreviation | Recombinant Human IL9 protein (Active) |
| MSDS | |
| Size | $354 |
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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.
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