Optimal preservation of protein structure, post-translational modifications and functions.
产品特性
Recombinant human Interleukin-4 / IL4 (transcript variant 1) protein expressed in E. coli.
Produced with end-sequenced ORF clone
Tested for bioactivity.
内毒素水平
Endotoxin level is <0.1 ng/μg of protein (<1EU/μg).
Biological Activity Comment
ED50 as determined by the dose-dependent stimulation of human TF-1 cells is less than or equal to 0.2 ng/ml, corresponding to a specific activity of > 5 x 10^6 units/mg.
IL4
宿主: 人
宿主: Mammalian Cells
Recombinant
The purity of the protein is greater than 95 % as determined by SDS-PAGE and Coomassie blue staining.
应用备注
Recombinant human proteins can be used for: Native antigens for optimized antibody production Positive controls in ELISA and other antibody assays Protein-protein interaction In vitro biochemical assays and cell-based functional assays
限制
仅限研究用
缓冲液
Lyophilized from a 0.2 μM filtered solution of 20 mM phosphate buffer,100 mM NaCl, pH 7.2
注意事项
Resuspend the protein in the desired concentration in proper buffer
储存条件
-80 °C
储存方法
Store at -80°C. Thaw on ice, aliquot to individual single-use tubes, and then re-freeze immediately. Only 2-3 freeze thaw cycles are recommended.
抗原
IL-4 (IL4)
(Interleukin 4 (IL4))
别名
Interleukin-4,il4
背景
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. Two alternatively spliced transcript variants of this gene encoding distinct isoforms have been reported.