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Analysis of IgA (Human, Non-human primate) by ELISA (CAT#: STEM-MB-0912-LGZ)

Introduction

Immunoglobulin A (IgA) is divided into serotype and secretory type. It is the antibody second only to IgG in serum, accounting for 15%-25% of the total immunoglobulin. It has a high content in extraneous secretions, such as colostrum, saliva, tears, intestinal secretions and bronchial secretions, and plays an important role in preventing infection. Secretory IgA is a dimer with stable properties and high local concentrations. It is the main immunoglobulin in mucous secretions, including tears, saliva, sweat, colostrum and secretions of urogenital tract, gastrointestinal tract, prostate and respiratory epithelium.




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

Immunology/Inflammation

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 or other biological fluids
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