| Code | CSB-AP001911HU |
| Abbreviation | Recombinant Human IL33 protein, partial (Active) |
| MSDS | |
| Size | $354 |
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IL-33 is a potent alarmin cytokine that drives type 2 immune responses through ST2/IL-1RAcP receptor engagement, activating NF-κB and MAPK signaling cascades central to allergy, inflammation, and tissue repair research. This tag-free recombinant human IL-33 (residues 112–270) encompasses the mature cytokine domain and demonstrates exceptional signaling potency, with an ED50 below 0.05 ng/ml in murine D10S cell proliferation assays, corresponding to a specific activity exceeding 2.0 × 10⁷ IU/mg. Endotoxin levels below 1.0 EU/μg minimize LPS-driven artifacts, making this protein appropriate for sensitive immune cell functional assays—including T cell activation, ILC2 expansion, and mast cell degranulation studies—as well as in vivo models of airway inflammation or atopic disease. Purity exceeding 97% by SDS-PAGE further supports use as a reference standard in cytokine detection assays or as a reliable positive control for antibody validation by ELISA and western blot.
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