Detection Method:Sandwich
Test principle:This assay employs a two-site sandwich ELISA to quantitate CTSZ in samples. An antibody specific for CTSZ has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and anyCTSZ present is bound by the immobilized antibody. After removing any unbound substances, a biotin-conjugated antibody specific for CTSZ 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 CTSZ bound in the initial step. The color development is stopped and the intensity of the color is measured.
Product Overview:Cathepsin Z or cathepsin X is a lysosomal cysteine proteinase and member of the peptidase C1 family. It exhibits both carboxy-monopeptidase and carboxy-dipeptidase activities. The encoded protein has also been known as cathepsin X and cathepsin P. This gene is expressed ubiquitously in cancer cell lines and primary tumors and, like other members of this family, may be involved in tumorigenesis. The predicted 303-amino acid protein has the domain structure characteristic of cysteine proteinases, including a signal sequence, a prodomain, and a catalytic domain responsible for proteolytic activity. However, it also contains 3 unique peptide insertions. Cathepsin Z shares protein sequence identity with other human cysteine proteinases of the papain family, including 34% with cathepsin C and 26% with cathepsin B.
