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生物来源
human
质量水平
重组
expressed in E. coli
检测方案
≥98% (SDS-PAGE)
形式
lyophilized powder
效能
≤0.400 ng/mL EC50
质量
endotoxin tested
分子量
14.9 kDa (containing 129 amino acid residues)
包装
pkg of 5 and 50 μg
技术
cell culture | mammalian: suitable
杂质
≤1.000 EU/μg
颜色
white
UniProt登记号
储存温度
−20°C
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相关类别
一般描述
白细胞介素-4（IL-4）是一种多效细胞因子，可调节多种 T细胞和B细胞反应，包括将初始 T细胞分化为TH2 表型，促进 B细胞增殖、抗体同种型转换和其他 TH2细胞因子（包括IL-5和IL-9）的表达。1,2 IL-4在过敏性炎症和哮喘的发生中起关键作用。3
IL-4 与两种不同的受体结合；I型受体，由IL-4Rα 链和常见 γ 链组成的异二聚体，γc，和II型受体，IL-4Rα和IL-13Rα的异二聚体。4
天然存在的IL-4分子质量为12-20 kDa。重组人IL-4是含有129个氨基酸残基的14.9kDa蛋白质。人和小鼠 IL-4 具有50％的氨基酸序列同源性，但它们的生物学作用是物种特异性的。5
IL-4 与两种不同的受体结合；I型受体，由IL-4Rα 链和常见 γ 链组成的异二聚体，γc，和II型受体，IL-4Rα和IL-13Rα的异二聚体。4
天然存在的IL-4分子质量为12-20 kDa。重组人IL-4是含有129个氨基酸残基的14.9kDa蛋白质。人和小鼠 IL-4 具有50％的氨基酸序列同源性，但它们的生物学作用是物种特异性的。5
应用
淋巴因子对免疫活性细胞的生长和分化具有明显的影响，抑制 VEGF和βFGF 诱导的血管生成。
外形
从无菌过滤溶液中冻干。
分析说明
通过剂量依赖性刺激人TF-1细胞的增殖来测量生物活性。
引用
1.Paul, W.E., Interleukin-4: a prototypic immuno-regulatory lymphokine.Blood, 77, 1859-1870 (1991).
2.O′Garra, A., and Arai, N., The molecular basis of T helper 1 and T helper 2 cell differentiation.Trends Cell Biol., 10, 542-550 (2000).
3.Ryan, J.J. et al., Mast cell homeostasis: a fundamental aspect of allergic disease.Crit.Rev. Immunol., 27, 15-32 (2007).
4.Callard, R.E. et al., IL-4 and IL-13 receptors: are they one and the same? Immunol.Today, 17, 108-110 (1996).
5.Yokota, T. et al., Molecular biology of interleukin 4 and interleukin 5 genes and biology of their products that stimulate B cells, T cells and hemopoietic cells.Immunol.Rev., 102, 137-187 (1988).
6.Kitamura, T. et al., Establishment and characterization of a unique human cell line that proliferates dependently on GM-CSF, IL-3, or erythropoietin.J. Cell Physiol., 140, 323-334 (1989).
2.O′Garra, A., and Arai, N., The molecular basis of T helper 1 and T helper 2 cell differentiation.Trends Cell Biol., 10, 542-550 (2000).
3.Ryan, J.J. et al., Mast cell homeostasis: a fundamental aspect of allergic disease.Crit.Rev. Immunol., 27, 15-32 (2007).
4.Callard, R.E. et al., IL-4 and IL-13 receptors: are they one and the same? Immunol.Today, 17, 108-110 (1996).
5.Yokota, T. et al., Molecular biology of interleukin 4 and interleukin 5 genes and biology of their products that stimulate B cells, T cells and hemopoietic cells.Immunol.Rev., 102, 137-187 (1988).
6.Kitamura, T. et al., Establishment and characterization of a unique human cell line that proliferates dependently on GM-CSF, IL-3, or erythropoietin.J. Cell Physiol., 140, 323-334 (1989).
WGK
WGK 3
闪点(°F)
Not applicable
闪点(°C)
Not applicable
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