Anti-Human IL-33 – Biotin

Pricing & Details

Product No.B637
Formats AvailableView All
Product Type
Polyclonal Antibody
Alternate Names
Prod No.
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B637-50 µg
50 µg
In stock
Min: 1
Step: 1
Bulk quantities available. Contact us for pricing.

Antibody Details

Product Details

Reactivity Species
Host Species
Purified Recombinant Human IL-33 (Accession No.: O95760)
This biotinylated antigen affinity purified polyclonal antibody has been 0.2 µm filtered and lyophilized from modified Dulbecco’s phosphate buffered saline (1X PBS) pH 7.2 – 7.3 containing 50 µg of bovine serum albumin per µg of antibody with no calcium, magnesium, or preservatives present.
Storage and Handling
The lyophilized, biotinylated polyclonal antibody can be stored desiccated at -20°C to -70°C for up to twelve months from the date of receipt. The reconstituted biotin conjugate can be stored for at least four weeks at 2-8°C. For long-term storage of the reconstituted conjugate, aseptically aliquot into working volumes and store at -20°C to -70°C in a manual defrost freezer. Avoid Repeated Freeze Thaw Cycles. No detectable loss of activity was observed after six months.
Country of Origin
Next Day Ambient
Applications and Recommended Usage?
Quality Tested by Leinco
Western Blotting: To detect Goat IL-33 this biotin conjugate can be used at a concentration of 0.1-0.2 µg/ml. This biotin conjugate should be used in conjunction with compatible second-step reagents such as PN:A106 and a chromogenic substrate such as PN:T343. The detection limit for Goat IL-33 is 2 and 5 ng/lane under either reducing or non-reducing conditions. The sensitivity of detection may increase up to 50 fold when a chemiluminescent substrate is used. A suitable Western blotting control is I-840.
ELISA Sandwich Assay: This antibody can be used as the detection antibody in a sandwich ELISA at a concentration of approximately 0.1-0.4 µg/ml when used in conjunction with PN:I-858 as the capture antibody at 0.2-0.8 µg/ml and an optimal second step reagent such as PN:A106 for the detection of Goat IL-33.
Each investigator should determine their own optimal working dilution for specific applications. See directions on lot specific datasheets, as information may periodically change.


Goat Anti-Goat Interleukin 33 (IL-33) recognizes Goat IL-33. This antigen affinity purified polyclonal antibody was purified using a proprietary chromatographic technique that includes covalently immobilizing the antigen proteins or peptides to agarose based beads. This purification method enhances specificity, reduces nonspecific binding of extraneous IgG and provides you with the most reliable reagent available for your early discovery research.
Antigen Distribution
IL-33 is expressed by a wide variety of cell types, including fibroblasts, mast cells, dendritic cells, macrophages, osteoblasts, endothelial cells, and epithelial cells.
IL-33 is a 30 kD proinflammatory cytokine that belongs to the IL-1 superfamily. It signals inflammation in the body via the stimulation of macrophages, neutrophils, B cells, Th2 cells, eosinophils, basophils and mast cells. IL-33 is a ligand for IL33R (ST2), which is part of a cytokine receptor gene cluster that includes IL-1RI and IL-1RII. IL-33 binds ST2 and complexes with the IL-1R Accessory Protein (IL-1R-AcP) to form a functional signaling receptor complex facilitating the activation of NF-B and MAP kinase signaling pathways resulting in the production of type 2 cytokines from polarized Th2 cells. IL-33R can exist as a type I transmembrane glycoprotein or a soluble glycoprotein. The soluble IL-33R is thought to serve as a decoy receptor which competitively antagonizes the binding of IL-33 thereby reducing its biological effects. IL-33 has been linked with asthma, allergies, endometriosis, and hay fever. In addition, IL-33 resides in keratinocytes of the skin and is thought to trigger the itching associated with dermatitis when subjected to irritation or allergic conditions. Furthermore, in APP/PS1 mice, IL-33 has been shown to be effective in reversing the buildup and preventing the new formation of amyloid plaques that are characteristic of Alzheimer’s disease. However, the action of extracellular IL-33 is limited due to rapid oxidation that causes a molecular conformational change which prevents it from binding to the ST2 receptor.

Antigen Details

NCBI Gene Bank ID

References & Citations

1. Liew, FY. et al.(2007) Eur J. Immunol. 37: 2779
2. Jefferies, CA. et al.(2007) Sci. STKE. 390: 31
Indirect Elisa Protocol
General Western Blot Protocol
Products are for research use only. Not for use in diagnostic or therapeutic procedures.
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