The Growth Differentiation Factor 11 (GDF11) BioAssay™ ELISA Kit is a sandwich ELISA for in vitro quantitative measurement of GDF11 in human serum, plasma and other biological fluids.
Specificity:Recognizes human GDF11. No significant crossreactivity or interference between human GDF11 and analogues was observed.
Test Principle:The microtiter plate provided in this kit has been pre-coated with an antibody specific to human GDF11. Standards or samples are then added to the appropriate microtiter plate wells and incubated. Then a biotin-conjugated antibody specific to GDF11 is added. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. Free components are washed away. The substrate solution is added, only those wells that contain GDF11, biotin-conjugated antibody and enzyme-conjugated Avidin will apear blue in color. The enzyme-substrate reaction is terminated by the addition of sulfuric acid solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450nm ± 2nm. The OD value is proportional to the concentration of human GDF11. The concentration of GDF11 in the sample is then determined by comparing the O.D. of the sample to the standard curve.
Precaution:The Stop Solution (383030K) included for use with this kit is an acid solution. Wear eye, hand, face, and clothing protection when using this material.
Storage and Stability:Store *383030A, *383030B, *383030D and *383030E at -20°C. Store all the other components at 4°C. Unused kit is stable for 6 months after receipt. Once kit components are opened, it is highly recommended to use remaining reagents within 1 month provided this is within the expiration date of the kit. For maximum recovery of product, centrifuge the original vials after thawing and prior to removing the cap.
Assay Procedure Summary:1. Prepare all reagents, samples and standards
2. Add 100ul standard or sample to each well. Incubate 90 minutes at 37°C
3. Aspirate and add 100ul prepared Biotin Working Solution. Incubate 1 hour at 37°C
4. Aspirate and wash 3 times
5. Add 100ul prepared HRP Detection Working Solution. Incubate 30 minutes at 37°C
6. Aspirate and wash 5 times
7. Add 90ul Substrate. Incubate 15 minutes at 37°C
8. Add 50ul Stop Solution. Read at 450nm immediately.
