Human IL-33, His Tag, E. coli

Catalog Number

LDG037PHE

Datasheet

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• Specifications

  • Species of Origin

    Human

    Expression system

    Escherichia coli

  • Affinity Tag

    His Tag (C-term)

    Buffer

    Lyophilized from a 0.2 µm filtered solution of PBS, pH 7.4.

  • Purity

    >98% as determined by SDS-PAGE analysis.

    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 level

    <0.1 EU per 1 μg of the protein by the LAL method.

  • Form

    Lyophilized

• Background

  • Background

    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.

    Synonyms

    Interleukin-1 family member 11, IL-1F11, Nuclear factor from high endothelial venules, NF-HEV, Interleukin-33

  • Uniprot ID

    #O95760

    Sequence Note

    Ser112-Thr270

• Instruction

  • Reconstitution

    It is recommended to reconstitute the lyophilized protein in sterile H₂O to a concentration not less than 200 μg/mL and incubate the stock solution for at least 20 min to ensure sufficient re-dissolved.

    Shipping

    The product is shipped with polar packs. Upon receipt, store it immediately at -20°C or lower for long term storage.

  • Stability & Storage

    This product is stable after storage at:

    • -20°C for 12 months in lyophilized state from date of receipt.
    • -20°C or -80°C for 1 month under sterile conditions after reconstitution.

    Avoid repeated freeze/thaw cycles.

• Image

  SDS-PAGE analysis of recombinant human IL-33.

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• Datasheet & Documents

  Datasheet

  MSDS

  Manual

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Disclaimer：For Research Use or Further Manufacturing Only.