Detection Method:Sandwich
Test principle:This assay employs a two-site sandwich ELISA to quantitate TPO in samples. An antibody specific for TPO has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and anyTPO present is bound by the immobilized antibody. After removing any unbound substances, a biotin-conjugated antibody specific for TPO is added to the wells. After washing, Streptavidin conjugated Horseradish Peroxidase (HRP) is added to the wells. Following a wash to remove any unbound avidin-enzyme reagent, a substrate solution is added to the wells and color develops in proportion to the amount of TPO bound in the initial step. The color development is stopped and the intensity of the color is measured.
Product Overview:Thrombopoietin (TPO), is a key regulator of megakaryocytopoiesis and thrombopoiesis in vitroand in vivo. TPO has been purified and cloned from several species including mouse, rat, and dog. The proteins from the various species are highly conserved, exhibiting from 69-75% sequence identity at the amino acid sequence level. Mature TPO can be divided into two domains: the amino-terminal half with homology to erythropoietin (Epo) and the carboxy-terminal half rich in serine, threonine and proline residues and containing seven potential N-linked glycosylation sites. The carboxy terminus domain of TPO has been shown to regulate the specific activity and circulating half-life of TPO. The carboxy-terminal may also have a role in promoting the efficient biosynthesis and secretion of TPO.
