N-Acetyl beta-D-Glucosaminidase (NAG) ELISA Kit

Antigen: N-Acetyl beta-D-Glucosaminidase (NAG)

Reaktivität: Human

Applikation: ELISA

Zertifikate: ISO 9001:2008

Produktnummer: ABIN366566

Produktbeschreibung

Produktmerkmale: This immunoassay kit allows for the in vitro quantitative determination of human NAG concentrations in serum, plasma and other biological fluids.

Weitere Bezeichnung: N-acetyl-beta-D-glucosaminidase (NAG)

Proben: Serum, Plasma

Beschreibung: N-acetyl--D-Glucosaminidase is an enzyme that catalyzes the hydrolysis of the B-glycosidic bonds of N-acetyl-glucosamine or N- acetyl-galactosamine found especially in the proximal tubular epithelium. It plays an important role in the metabolism of glycoproteins, mucopolysaccharides, and sphingolipids.

Spezifität: This assay recognizes human NAG. No significant cross-reactivity or interference was observed.

Sensitivität: The minimum detectable dose of human NAG is typically less than 2 mIU/ml. The sensitivity of this assay, or Lower Limit of Detection (LLD) was defined as the lowest concentration that could be differentiated from zero. Detection Range: The minimum detectable dose of human NAG is typically less than 2 mIU/ml. The sensitivity of this assay, or Lower Limit of Detection (LLD) was defined as the lowest concentration that could be differentiated from zero.

Anwendungen

Prinzip: The microtiter plate provided in this kit has been pre-coated with an anti-NAG antibody. Standards or samples are then added to the appropriate microtiter plate wells with a Horseradish Peroxidase (HRP)-conjugated NAG and incubated. Then substrate solution A and B are added to each well. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The concentration of NAG in the samples is then determined by comparing the O.D. of the samples to the standard curve.

Protokoll: Reagent Preparation:
1. Bring all reagents and plate to room temperature for at least 30 minutes before use. Unused wells need store at 2-8°C and avoid sunlight. 2. Wash Buffer If crystals have formed in the concentrate, warm to room temperature and mix gently until the crystals have completely dissolved. Dilute 15 ml of Wash Buffer Concentrate into deionized or distilled water to prepare 300 ml of Wash Buffer. Precaution: The Stop Solution provided with this kit is an acid solution. Wear eye, hand, face, and clothing protection when using this material. 5.
Assay Procedure:
Bring all reagents and samples to room temperature before use. It is recommended that all samples, standards, and controls be assayed in duplicate. 6 1. Set a Blank well without any solution. Add 5 0μl of Standard or Sample per well. Standard need test in duplicate. 2. Add 50μl of HRP-conjugate to each well (not to Blank well). Mix well and then incubate for 1 hour at 37°C. 3. Complete remove the liquid. Then fill each well with Wash Buffer (about 200μl) , stay for 10 seconds and Spinning. Repeat the process for a total of three washes. Complete removal of liquid at each step is essential to good performance. After the last wash, remove any remaining Wash Buffer by aspirating or decanting. Invert the plate and blot it against clean paper towels. 4. Add 5 0μl of Substrate A and 50μl of Substrate B to each well, mix well. Incubate for 15 minutes at 37°C. Keeping the plate away from drafts and other temperature fluctuations in the dark. 5. Add 50μl of Stop Solution to each well. If color change does not appear uniform, gently tap the plate to ensure thorough mixing. 6. Determine the optical density of each well within 10 minutes, using a microplate reader set to 450 nm.
Calculation of Results:
Average the duplicate readings for each standard, control, and 7 sample and subtract the average zero standard optical density. Create a standard curve by reducing the data using computer software capable of generating a four parameter logistic (4-PL) curve-fit. As an alternative, construct a standard curve by plotting the mean absorbance for each standard on the y-axis against the concentration on the x-axis and draw a best fit curve through the points on the graph. The data may be linearized by plotting the log of the NAG concentrations versus the log of the O.D. and the best fit line can be determined by regression analysis. This procedure will produce an adequate but less precise fit of the data. If samples have been diluted, the concentration read from the standard curve must be multiplied by the dilution factor.
Limitations of the Procedure:
The kit should not be used beyond the expiration date on the kit label.Do not mix or substitute reagents with those from other lots or sources.It is important that the Calibrator Diluent selected for the standard curve be consistent with the samples being assayed.If samples generate values higher than the highest standard, dilute the samples with the appropriate Calibrator Diluent and repeat the assay. 8Any variation in Standard Diluent, operator, pipetting technique, washing technique, incubation time or temperature, and kit age can cause variation in binding.This assay is designed to eliminate interference by soluble receptors, binding proteins, and other factors present in biological samples. Until all factors have been tested in the Immunoassay, the possibility of interference cannot be excluded.
Sample collection and storage:
Serum Use a serum separator tube (SST) and allow samples to clot for 30 minutes before centrifugation for 15 minutes at 1000 g. Remove serum and assay immediately or aliquot and store samples at -20° C. Avoid repeated freeze-thaw cycles. Plasma Collect plasma using citrate, EDTA, or heparin as an anticoagulant. Centrifuge for 15 minutes at 1000 g within 30 minutes of collection. Assay immediately or aliquot and store samples at -20°C. Avoid repeated freeze-thaw cycles. Note: Grossly hemolyzed samples are not suitable for use in this assay.

Testdurchführung: Assay Time: 1-3h
Sample Volume: 50-100ul

Applikationshinweise: Detection Wavelength: 450 nm

Bestandteile: Reagent (Quantity): Assay plate (1), Standard (5x0.5ml), HRP-conjugate (1x6ml), Wash Buffer (20×concentrate) (1x15ml), Substrate A (1x7ml), Substrate B (1x7ml), Stop Solution (1x7ml)

Benötigtes Material: Microplate reader capable of measuring absorbance at 450 nm, with the correction wavelength set at 540 nm or 570 nm. Pipettes and pipette tips. Deionized or distilled water. Squirt bottle, manifold dispenser, or automated microplate washer.

Lagerung: 1. Unopened test kits should be stored at 2-8 C upon receipt and the microtiter plate should be kept in a sealed bag. The test kit may be used throughout the expiration date of the kit. Refer to the package label for the expiration date. 2. Opened test kits will remain stable until the expiring date shown, provided it is stored as prescribed above. 3. A microtiter plate reader with a bandwidth of 10 nm or less and an optical density range of 0-3 OD or greater at 450nm wavelength is acceptable for use in absorbance measurement.

Beschränkungen: Nur für Forschungszwecke einsetzbar