Human HCII (Heparin Cofactor II) ELISA Kit

The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Human HCII. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human HCII. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Human HCII, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of Human HCII in the samples is then determined by comparing the OD of the samples to the standard curve. Protein Function: Thrombin inhibitor activated by the glycosaminoglycans, heparin or dermatan sulfate. In the presence of the latter, HC-II becomes the predominant thrombin inhibitor in place of antithrombin III (AT-III). Also inhibits chymotrypsin, but in a glycosaminoglycan-independent manner , Peptides at the N-terminal of HC-II have chemotactic activity for both monocytes and neutrophils , Shows negligible inhibition, in vitro, of thrombin and tPA and no inhibition of factor Xa, in vitro [The Uniprot Consortium]