Active Recombinant Human IL4 Protein (His25-Ser153), GMP Grade, Animal-Free

• Cat.No.: IL4-25HG
• Product Overview: GMP recombinant human IL-4 protein (His25-Ser153) with an N-terminal Met was expressed in E. coli, produced in an Animal-Free laboratory and manufactured and tested under cGMP guidelines.

Specification

• Description: The protein encoded by this gene is a pleiotropic cytokine produced by activated T cells. This cytokine is a ligand for interleukin 4 receptor. The interleukin 4 receptor also binds to IL13, which may contribute to many overlapping functions of this cytokine and IL13. STAT6, a signal transducer and activator of transcription, has been shown to play a central role in mediating the immune regulatory signal of this cytokine. This gene, IL3, IL5, IL13, and CSF2 form a cytokine gene cluster on chromosome 5q, with this gene particularly close to IL13. This gene, IL13 and IL5 are found to be regulated coordinately by several long-range regulatory elements in an over 120 kilobase range on the chromosome. IL4 is considered an important cytokine for tissue repair, counterbalancing the effects of proinflammatory type 1 cytokines, however, it also promotes allergic airway inflammation. Moreover, IL-4, a type 2 cytokine, mediates and regulates a variety of human host responses such as allergic, anti-parasitic, wound healing, and acute inflammation. This cytokine has been reported to promote resolution of neutrophil-mediated acute lung injury. In an allergic response, IL-4 has an essential role in the production of allergen-specific immunoglobin (Ig) E. This pro-inflammatory cytokine has been observed to be increased in COVID-19 (Coronavirus disease 2019) patients, but is not necessarily associated with severe COVID-19 pathology. Two alternatively spliced transcript variants of this gene encoding distinct isoforms have been reported.
• Source: E. coli
• Species: Human
• Bio-activity: Measured in a cell proliferation assay using TF-1 human erythroleukemic cells. The ED50 for this effect is 0.05-0.2 ng/mL.
  The specific activity of recombinant human IL-4 is >1.0 x 107 IU/mg, which is calibrated against the human IL-4 WHO International Standard.
• Molecular Mass: Predicted Molecular Mass: 15.1 kDa
  SDS-PAGE: 14 kDa, reducing conditions
• Protein Length: His25-Ser153
• N-terminal Sequence Analysis: Met-His25-Lys-(Cys)-Asp-Ile-Thr-Leu-Gln-Glu
• Endotoxin: <0.10 EU/ μg of the protein by the LAL method.
• Purity: >97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
• Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  A minimum of 12 months when stored at ≤ -20 centigrade as supplied. Refer to lot specific COA for the Use by Date.
  1 month, 2 to 8 centigrade under sterile conditions after reconstitution.
  3 months, ≤ -20 centigrade under sterile conditions after reconstitution.
• Storage Buffer: Lyophilized from a 0.2 μm filtered solution in PBS.
• Reconstitution: Reconstitute at 100-200 μg/mL in PBS.
• Shipping: The product is shipped with polar packs.

Gene Information

• Gene Name: IL4 interleukin 4 [ Homo sapiens ]
• Official Symbol: IL4
• Synonyms: IL4; interleukin 4; interleukin-4; B cell growth factor 1; B_cell stimulatory factor 1; BCGF 1; BCGF1; BSF1; IL 4; lymphocyte stimulatory factor 1; MGC79402; binetrakin; pitrakinra; IL-4; BSF-1; BCGF-1
• Gene ID: 3565
• mRNA Refseq: NM_000589
• Protein Refseq: NP_000580
• MIM: 147780
• UniProt ID: P05112