IL-4 High Sensitivity ELISA Kit (Human)

ELISA Kit

Wet Ice

IL-4

153

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.

NP_000580.1

Ten specificities were tested with concentrations higher than IL-4 curve concentrations. No cross reaction was observed for IL-2, IL-5, IL-6, IL-7, IL-8, IL-12, IL-13, TNF-alpha, IFNgamma and FasL.

< 4 Hours

Aviva Systems Biology IL-4 High Sensitivity ELISA Kit (Human) (OKDB00045) is designed for the highly sensitive in-vitro quantitative measurement of recombinant or natural IL-4 in human sera, plasmas, buffered solutions or cell culture media. The kit is based on standard sandwich enzyme-linked immuno-sorbent assay methods along with an additional detection process employing a polymerization step to amplify the number of detector bound HRP molecules. A monoclonal antibody specific for IL-4 has been pre-coated into wells of a 96-wellplate. Standards or test samples are added to the wells and incubated. After washing, a biotinylated detector antibody specific for IL-4 is added, incubated and followed by washing. Streptavidin-HRP conjugate is then added, incubated and unbound conjugate is washed away. Amplification is achieved by adding a Biotin-Tyramine reagent, incubating and washing, followed by a second incubation with Streptavidin-HRP conjugate. An enzymatic reaction is then produced through the addition of TMB substrate which is catalyzed by HRP to generating a blue color product that changes yellow after adding acidic stop solution. The density of yellow coloration read by absorbance at 450 nm and is quantitatively proportional to the amount of sample IL-4 captured in well.

Two sera and two cell culture medium samples with various concentrations of IL-4 were tested for repeatability and reproductibility. Each assay was carried out with 8 replicates of each sample. Three independent assays were performed. The intra-assay and inter-assay coefficient of variation has been calculated to be 9.2% and 13.7% respectively