Abbreviation
Recombinant Human IL33 protein, partial (Active)
Purity
>97% 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 murine D10S cells is less than 0.05 ng/ml, corresponding to a specific activity of >2.0x107 IU/mg.
Alternative Names
C9orf26; CHROMOSOME 9 OPEN READING FRAME 26; DKFZp586H0523; DVS27; DVS27 related protein; IL 1F11; IL 33; IL-1F11; IL-33; IL1F11 ; IL33; IL33_HUMAN; Interleukin 1 family member 11; Interleukin 33; INTERLEUKIN 33 NFHEV; Interleukin 33 precursor ; Interleukin-1 family member 11; Interleukin-33 (109-270); Interleukin33; NF HEV; NF-HEV; NFEHEV; NFHEV; Nuclear factor for high endothelial venules; Nuclear factor from high endothelial venules; OTTHUMP00000021041; RP11 575C20.2
Species
Homo sapiens (Human)
Expression Region
112-270aa
Target Protein Sequence
SITGISPIT EYLASLSTYN DQSITFALED ESYEIYVEDL KKDEKKDKVLLSYYESQHPS NE SGDGVDGK MLMVTLSPTK DFWLHANNKE HSVELHKCEKPLPDQAFFVL HNMHSNCVSF ECKTDPGVFI GVKDNHLALI KVDSSENLCT ENILFKLSET
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.
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 0.2μm filtered 20 mM PB, 150 mM NaCl, 1mM EDTA, pH7.4
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-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.