{"product_id":"recombinant-human-interleukin-4-rhuil-4-pr1072","title":"Recombinant Human Interleukin-4 (rHuIL-4) - PR1072","description":"\u003cp\u003eRecombinant Human Interleukin-4 (rHuIL-4)\u003c\/p\u003e\n\n\u003cp\u003eCatalogue Numbers: PR1072-5, PR1072-20\u003c\/p\u003e\n\n\u003cp\u003eSizes: 5µg, 20µg\u003c\/p\u003e\n\n\u003cp\u003eSource: Escherichia coli\u003c\/p\u003e\n\n\u003cp\u003eMolecular Weight: Approximately 15 kDa, a single non-glycosylated polypeptide chain containing 130 amino acids.\u003c\/p\u003e\n\n\u003cp\u003ePurity: \u0026gt;95% by SDS-PAGE and HPLC analyses.\u003c\/p\u003e\n\n\u003cp\u003eBiological Activity: Fully biologically active when compared to standard. The ED50 as determined by the dose-dependant stimulation of TF1 cells is less than 0.2 ng\/ml, corresponding to a Specific Activity of ＞5 x 106 IU\/mg.\u003c\/p\u003e\n\n\u003cp\u003ePhysical Appearance: Sterile Filtered White lyophilized (freeze-dried) powder.\u003c\/p\u003e\n\n\u003cp\u003eFormulation: Lyophilized from a 0.2mm filtered concentrated solution in PBS, pH 7.4.\u003c\/p\u003e\n\n\u003cp\u003eAA Sequence: MHKCDITLQE IIKTLNSLTE QKTLCTELt V TDIFAASKNT TEKETFCRAA t VLRQFYSHH EKDTRCLGAT AQQFHRHKQL IRFLKRLDRN LWGLAGLNSC PVKEANQSTL ENFLERLKTI MREKYSKCSS\u003c\/p\u003e\n\n\u003cp\u003eEndotoxin: Less than 1EU\/mg of rHuIL-4 as determined by LAL method.\u003c\/p\u003e\n\n\u003cp\u003eReconstitution: We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0 mg\/mL. Stock solutions should be apportioned into working aliquots and stored at \u0026lt;-20°C. Further dilutions should be made in appropriate buffered solutions.\u003c\/p\u003e\n\n\u003cp\u003eStorage: This lyophilized preparation is stable at 2-8°C, but should be kept at -20°C for long term storage, preferably desiccated. Upon reconstitution, the preparation is stable for up to one week at 2-8°C. For maximal stability, apportion the reconstituted preparation into working aliquots and store at -20°C to -70°C. Avoid repeated freeze\/thaw cycles.\u003c\/p\u003e\n\n\u003cp\u003eUsage: This material is offered by USA Bioworld biotech for research, laboratory or further evaluation purposes. NOT FOR HUMAN USE. Made in China\u003c\/p\u003e\n\n\u003cp\u003eDescription: Interleukin-4 is a pleiotropic cytokine that regulates diverse T and B cell responses including cell proliferation, survival and gene expression. Produced by mast cells, T cells and bone marrow stromal cells, IL-4 regulates the differentiation of naive CD4+ T cells into helper Th2 cells, characterized by their cytokine-secretion profile that includes secretion of IL-4, IL-5, IL-6, IL-10, and IL-13, which favor a humoral immune response. Another dominant function of IL-4 is the regulation of immunoglobulin class switching to the IgG1 and IgE isotypes. Excessive IL-4 production by Th2 cells has been associated with elevated IgE production and allergy.\u003c\/p\u003e","brand":"BioWorld","offers":[{"title":"5µg","offer_id":42882226061491,"sku":"PR1072-5","price":260.23,"currency_code":"CAD","in_stock":true},{"title":"20µg","offer_id":42882226094259,"sku":"PR1072-20","price":490.83,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0305\/9482\/6376\/products\/thumbnail_d1447bac803ec9be_11-14-09-19-51_e984e77f-b60e-4ed2-901e-f3ec382fa11d.jpg?v=1702049631","url":"https:\/\/afsbio.com\/products\/recombinant-human-interleukin-4-rhuil-4-pr1072","provider":"AFSBio Inc.","version":"1.0","type":"link"}