Human substance P (SP) enzyme-linked immunoassay kit instruction manual

**Detection Range: 7 ng/L – 240 ng/L** **Purpose of Use:** This kit is designed for the quantitative determination of Substance P (SP) in human serum, plasma, and other related biological samples. It provides a reliable and efficient method to measure SP levels, which can be useful in clinical research and diagnostic applications. **Experimental Principle:** The kit utilizes the double-antibody sandwich ELISA method to detect the concentration of human Substance P in the sample. A microtiter plate is pre-coated with a specific monoclonal antibody against SP. After adding the sample, SP in the sample binds to the immobilized antibody. Then, a horseradish peroxidase (HRP)-labeled secondary antibody is added, forming a complex of antibody-antigen-enzyme-labeled antibody. Following a thorough washing step, TMB substrate is introduced. Under the catalytic action of HRP, TMB turns blue and then changes to yellow upon addition of the stop solution. The intensity of the color is directly proportional to the amount of SP present in the sample. The optical density (OD) is measured at 450 nm using a microplate reader, and the SP concentration is calculated based on a standard curve. **Kit Composition:** 1. 30× Washing Solution – 20 ml × 1 bottle 2. Stop Solution – 6 ml × 1 bottle 3. Enzyme Standard Reagent – 6 ml × 1 bottle 4. Enzyme-Labeled Coating Plate – 12 wells × 8 strips 5. Sample Diluent – 6 ml × 1 bottle 6. Color Reagent A – 6 ml × 1 bottle 7. Color Reagent B – 6 ml × 1 bottle 8. Standard Product (480 ng/L) – 0.5 ml × 1 bottle 9. Standard Diluent – 1.5 ml × 1 bottle 10. Instructions – 1 part 11. Sealing Film – 2 sheets 12. Seal Bag – 1 piece This comprehensive kit ensures accurate and reproducible results, making it an ideal choice for laboratories conducting SP-related studies. All components are stable and ready to use, ensuring convenience and efficiency in the testing process.

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