Recombinant Human IL-4

產(chǎn)品編號:

200-04

別名:

BCGF,BCDF,B cell stimulating factor （BSF-1）

描述:

IL-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. Recombinant human IL-4 is a 14.9 kDa globular protein containing 129 amino acid residues.

氨基酸序列:

MHKCDITLQE IIKTLNSLTE QKTLCTV TDIFAASKNT TEKETFCRAA TVLRQFYSHH EKDTRCLGAT AFHRHKQL IRFLKRLDRN LWGLAGLNSC PVKEANQSTL ENFLERLKTI MREKYSKCSS

來源:

E.coli

純度:

Greater than 98% by SDS-PAGE gel and HPLC analyses.

生物活性:

The ED₅₀ as determined by the dose-dependent stimulation of human TF-1 cells is ≤ 0.2 ng/ml, corresponding to a specific activity of ≥ 5 x 10⁶ units/mg.

研究領(lǐng)域:

原產(chǎn)國:

USA

僅用于研究。不適用于診斷或治療。