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Analysis of Cytokeratin-19 (Human) by ELISA (CAT#: STEM-MB-0766-LGZ)

Introduction

Cytokeratin 19 fragment (Cyfra 21-1) is a lung cancer-related tumor marker, belonging to the intermediate filament protein family, with a molecular weight of about 40kD, mainly present in the cytoplasm of tumor cells derived from epithelial cells such as esophageal cancer and lung cancer.




Principle

Enzyme-linked immunosorbent assay (ELISA) is an enzyme-labeled solid phase immunoassay technique. Its basic principle is to bind the antigen (or antibody) to the solid phase carrier, and the antigen (or antibody) and a certain enzyme link to enzyme labeled antigen (or antibody). During detection, the sample to be tested and the enzymic antigen (or antibody) react with the antigen (or antibody) on the solid phase carrier according to certain procedures, and then remove the unreacted part by washing method. After adding the substrate, the substrate is catalyzed by the enzyme on the solid phase carrier to produce colored substances. Through qualitative or quantitative detection of the amount of colored products, the content of the substance to be measured in the sample can be determined.

Applications

Cancer

Procedure

1. Add standards or samples to each well and incubate.
2. Pour off the liquid in the well, biotinylated antibody working solution and incubate.
3. Add enzyme conjugate working solution and incubate.
4. Add substrate TMB and incubate.
5. Add stop solution and measure OD value.
6. Calculation of results.

Materials

• Sample Type: serum, plasma, supernatant
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