Name : Biotinylated Human IL-4 Protein

Product Source :
Recombinant Biotinylated Human IL-4 Protein is expressed from HEK293 with His tag and Avi tag at the C-Terminus. It contains His25-Ser153.[Accession | P05112-1]

Molecular Weight :
The protein has a predicted MW of 17.8 kDa. Due to glycosylation, the protein migrates to 23-25 kDa based on Tris-Bis PAGE result.

Endotoxin Level :
Less than 1EU per μg by the LAL method.

Purity :
> 95% as determined by Tris-Bis PAGE

Formulation :
Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.

Reconstitution :
Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.

Storage and Stability :
-20 to -80°C for 12 months as supplied from date of receipt. -80°C for 3-6 months after reconstitution. 2-8°C for 2-7 days after reconstitution. Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.

Product Concentration :
Tris-Bis PAGE Biotinylated IL-4 on Tris-Bis PAGE under reduced condition. The purity is greater than 95%. ELISA Data Immobilized Human IL-4 R alpha, hFc Tag at 0.5μg/ml (100μl/Well) on the plate. Dose response curve for Biotinylated Human IL-4, His Tag with the EC50 of 6.3ng/ml determined by ELISA.

Background :
Interleukin-4, also known as IL4, is a secreted protein which belongs to the IL-4 / IL-13 family. Interleukin-4 / IL4 has many biological roles, including the stimulation of activated B-cell and T-cell proliferation.In the presence of IL-4 and IL-13, cytokines that are produced in a Th-2 type response, particularly during allergy and parasitic infections, macrophages become differentially activated, And this cytokine is a ligand for interleukin 4 receptor.

Synonyms :
IL4; IL-4; interleukin 4; MGC79402; pitrakinra; B cell growth factor 1; BCDF; BCGF1; BCGF-1; binetrakin; BSF1; BSF-1; BSF-1

References & Citations :
(1)Ghoreschi K , Thomas P , Breit S , et al. Interleukin-4 therapy of psoriasis induces Th2 responses and improves human autoimmune disease[J]. Nature Medicine, 2002, 9(1):40-46.

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