Human AR(Amphiregulin) ELISA Kit (E-EL-H0237)

This ELISA kit uses the Sandwich-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Human AR. Standards or samples are added to the micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Human AR and Avidin-Horseradish Peroxidase (HRP) conjugate are added successively to each micro plate well and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Human AR, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by the addition of stop solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Human AR. You can calculate the concentration of Human AR in the samples by comparing the OD of the samples to the standard curve.

Amphiregulin was initially identified in the conditioned medium of human mammary gland MCF-7 cells treated with TPA. The mouse gene was cloned from the androgen-dependent SC2G cell line derived from Shionogi mouse mammary carcinoma SC115. It belongs to the EGF family of proteins that includes EGF, TGF-α, heparin-binding EGF like-growth factor (HB-EGF), epigen, epiregulin, and betacellulin. Mouse amphiregulin is derived from a 248 amino acid transmembrane precursor and it has 66% identity to the human protein. All the EGF family members are synthesized as type I membrane protein precursors, which can undergo proteolytic cleavage at the plasma membrane to release a mature soluble ectodomain. ADAM17 (TACE) has an important role in ectodomain shedding of amphiregulin, TNF-α, and HB-EGF. This cleavage is a key step in the control of ligand availability and receptor activation.