{"product_id":"ca19-9-carbohydrate-antigen19-9-elisa-kit-04212026a","title":"CA19-9 (Carbohydrate antigen19-9) ELISA Kit","description":"\u003cp\u003eThis CA19-9 (Carbohydrate antigen19-9) 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 CA19-9. Samples (or Standards) and Horseradish Peroxidase (HRP) linked antibody specific for Human CA19-9 are added to the micro ELISA plate wells. Human CA19-9 in samples (or standards) combines with the coated antibody and HRP linked detection antibody special to Human CA19-9.Excess conjugate and unbound sample or standard are washed from the plate. The substrate solution is added to each well. 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 CA19-9. The concentration of Human CA19-9 in the samples is then determined by comparing the OD of the samples to the standard curve.\u003c\/p\u003e","brand":"Elabscience","offers":[{"title":"96 wells","offer_id":48821304819940,"sku":"E-OSEL-H0031","price":676.0,"currency_code":"USD","in_stock":true},{"title":"48 wells","offer_id":48821304852708,"sku":"E-OSEL-H0031-48w","price":541.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/6238\/8964\/files\/E-OSEL-H0031.jpg?v=1777055982","url":"https:\/\/www.ardentbio.com\/products\/ca19-9-carbohydrate-antigen19-9-elisa-kit-04212026a","provider":"Ardent Bio LLC","version":"1.0","type":"link"}