Detection Method:Sandwich
Test principle:This assay employs a two-site sandwich ELISA to quantitate PEA in samples. An antibody specific for PEA has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and anyPEA present is bound by the immobilized antibody. After removing any unbound substances, a biotin-conjugated antibody specific for PEA 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 PEA bound in the initial step. The color development is stopped and the intensity of the color is measured.
Product Overview:The Pseudomonas exotoxin (or exotoxin A) is an exotoxin produced by Pseudomonas aeruginosa. It inhibits elongation factor-2. It does so by ADP-ribosylation of EF2. This then causes the elongation of polypeptides to cease.(The mechanism of the toxin is similar to that of Diphtheria toxin.) It has been investigated as a treatment for hepatitis B[3] and cancer.