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Product Info Summary
| SKU: | PROTO95760-4 |
|---|---|
| Size: | 5ug,20ug,100ug |
| Origin Species: | Human |
| Source: | Escherichia coli |
| Application: | Cell Culture |
Product info
Product Name
Human recombinant IL-33 (Interleukin-33) protein, AF
View all IL33 recombinant proteins
SKU/Catalog Number
PROTO95760-4
Size
5ug,20ug,100ug
Tag
His Tag (C-term)
Description
Interleukin 33 (IL-33) is an 18 kDa cytokine with 169 amino acid residues. Interleukin-33 is a member of the IL-1 cytokine family and is primarily expressed in endothelial cells, epithelial cells, fibroblasts, and mesenchymal cells. When IL-33 binds to its receptor, ST2L, it activates mast cells and innate lymphoid cells and subsequently generates IL-5 and IL-13, which play essential roles in allergic inflammation. IL-33 also acts as an alarm by alerting the immune system of cellular damage and plays a critical role in type-2 innate immunity.
Storage & Handling
Lyophilized protein should be stored at -20°C for 1 year. Upon reconstitution, store at 2°C to 8°C for up to 1 week. Further dilute in a buffer containing a carrier protein or stabilizer (e.g. 0.1% BSA, 10%FBS, 5%HSA or 5% trehalose solution), protein aliquots should be stored at -20°C or -80°C for 3-6 months. Avoid repeated freeze/thaw cycles.
Cite This Product
Human recombinant IL-33 (Interleukin-33) protein, AF (Boster Biological Technology, Pleasanton CA, USA, Catalog # PROTO95760-4)
Form
Lyophilized
Formulation
The protein was lyophilized from a 0.2 μm filtered solution containing 1X PBS, pH 7.4. If you have any concerns or special requirements, please confirm with us.
Purity
>98% as determined by SDS-PAGE.
Predicted MW
30.8 kDa
Molecular weight
The protein has a calculated MW of 18.93 kDa. The protein migrates as 19 kDa under reducing condition (SDS-PAGE analysis).
Activity
Measure by its ability to binding with recombinant ST2L (IL-33 receptor). The ED₅₀ for this effect is <54 ng/mL. Measure by its ability to induce proliferation in D10.G4.1 cells. The ED₅₀ for this effect is < 0.1 ng/mL. The specific activity of recombinant human IL-33 is approximately >4 x10⁷ IU/ mg.
Endotoxin
<0.1 EU per 1 μg of the protein by the LAL method.
Amino Acid Sequence
MSITGISPITEYLASLSTYNDQSITFALEDESYEIYVEDLKKDEKKDKVLLSYYESQHPSNESGDGVDGKMLMVTLSPTKDFWLHANNKEHSVELHKCEKPLPDQAFFVLHNMHSNCVSFECKTDPGVFIGVKDNHLALIKVDSSENLCTENILFKLSET with polyhistidine tag at the C-terminus.
Reconstitution
Centrifuge at 3000 rpm for 5 mins before opening. It is recommended to reconstitute the lyophilized protein in sterile H₂O to a concentration not less than 100 μg/mL and incubate the stock solution at room temperature for at least 20 mins to ensure sufficient re-dissolved. Do Not Vortex! Vigorous shaking may impair the biological activity of the protein.
Assay dilution & Images
Validation Images & Assay Conditions
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SDS- PAGE analysis of recombinant human IL-33
Specific Publications For Human recombinant IL-33 (Interleukin-33) protein, AF (PROTO95760-4)
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