Murinoglobulin ELISA Kit

Catalog No. ABIN956113

Rat Murinoglobulin ELISA Kit, Colorimetric assay for quantification of Rat Murinoglobulin.

Quick Overview for Murinoglobulin ELISA Kit (ABIN956113)

Target: Murinoglobulin

Reactivity: Rat

Detection Method: Colorimetric

Method Type: Sandwich ELISA

Application: ELISA

Sample Type: Serum

Product Details

Analytical Method: Quantitative

Characteristics: The Rat Murinoglobulin ELISA is based on a solid phase enzyme-linked immunosorbent assay (ELISA). The assay uses affinity purified anti-rat murinoglobulin antibodies for solid phase (microtiter wells) immobilization and horseradish peroxidase (HRP) conjugated anti-rat murinoglobulin antibodies for detection. The test sample is diluted and incubated in the microtiter wells for 45 minutes. The microtiter wells are subsequently washed and HRP conjugate is added and incubated for 30 minutes. This results in murinoglobulin molecules being sandwiched between the immobilization and detection antibodies. The wells are then washed to remove unbound HRP-labeled antibodies and TMB Reagent is added and incubated for 20 minutes at room temperature. This results in the development of blue color. Color development is stopped by the addition of Stop Solution, changing the color to yellow and optical density is measured spectrophotometrically at 450 nm. The concentration of murinoglobulin is proportional to the optical density of the test sample.

Components: Anti-rat murinoglobulin antibody coated microtiter plate with 96 wells (provided as 12 detachable strips of 8)
Enzyme Conjugate Reagent, 11 mL
Rat Murinoglobulin Calibrator (1 vial lyophilized, containing 2 µg/mL rat murinoglobulin when reconstituted as detailed on the vial label)
Diluent (10X), 25 mL
Wash Solution (20X), 50 mL
TMB Reagent (One-Step), 11 mL
Stop Solution (1N HCl), 11 mL.

Material not included: Precision pipettes and tips
Distilled or de-ionized water
Polypropylene or glass tubes
Vortex mixer
Absorbent paper or paper towels
Micro-Plate incubator/shaker mixing speed of ~150 rpm
Plate reader with an optical density range of 0-4 at 450 or 405 nm
Graph paper (PC graphing software is optional)

Application Details

Plate: Pre-coated

Sample Preparation:

General Note: Murinoglobulin is present in normal rat serum at a concentration of ~ 6 mg/mL. In order to obtain values within the range of the calibration curve, we suggest that samples be diluted 100,000 fold using the following procedure for each sample to be tested:
1. Dispense 998 µL and 497.5 µL of 1X diluent into separate tubes.
2. Pipette and mix 2 µL of the serum/plasma sample into the tube containing 998 µL of diluent. This provides a 500 fold diluted sample.
3. Mix 2.5 µL of the 500 fold diluted sample with the 497.5 µL of diluent in the second tube. This provides a 100,000 fold dilution of the sample.
4. Repeat this procedure for each sample to be tested.

Assay Procedure:

1. Secure the desired number of coated wells in the holder.
   2. Dispense 100 µL of calibrators and samples into the wells (we recommend that samples be tested in duplicate).
   3. Incubate on an orbital micro-plate shaker at 100-150 rpm at room temperature (18-25°C) for 45 minutes.
   4. Remove the incubation mixture by flicking plate contents into an appropriate Bio-waste container.
   5. Wash and empty the microtiter wells 5 times with 1X wash solution. This may be performed using either a plate washer (350 µL/well) or with a squirt bottle. The entire wash procedure should be performed as quickly as possible.
   6. Strike the wells sharply onto adsorbent paper or paper towels to remove all residual water droplets.
   7. Add 100 µL of enzyme conjugate reagent into each well.
   8. Incubate on an orbital micro-plate shaker at 100-150 rpm at room temperature (18-25°C) for 30 minutes.
   9. Wash as detailed in 4 and 5 above.
   10. Strike the wells sharply onto absorbent paper or paper towels to remove residual water droplets.
   11. Dispense 100 µL of TMB Reagent into each well.
   12. Gently mix on an orbital micro-plate shaker at 100-150 rpm at room temperature (18-25°C) for 20 minutes.
   13. Stop the reaction by adding 100 µL of Stop Solution to each well.
   14. Gently mix. It is important to make sure that all the blue color changes to yellow.
   15. Read the optical density at 450 nm with a microtiter plate reader within 15 minutes. Please Note: If the A450 of the high calibrator(s) exceeds the limits of the plate reader, absorbance may be determined at 405 nm.

Calculation of Results:

1. Calculate the average absorbance value (A450) for each set of the reference calibrators and samples.
   2. Construct a calibration curve by plotting the mean absorbance obtained from each reference calibrator against its concentration in ng/mL on linear graph paper, with absorbance on the vertical or Y-axis and concentration on the horizontal or X-axis.
   3. Using the mean absorbance value for each sample, determine the corresponding concentration of murinoglobulin in ng/mL from the calibration curve.
   4. Multiply the derived concentrations by the dilution factor to determine the actual concentration of murinoglobulin in the serum/plasma sample.
   5. PC graphing software may be used for the above steps.
   6. If the OD450 values of samples fall outside the calibration curve when tested at a dilution of 100,000, samples should be diluted appropriately and re-tested.

Restrictions: For Research Use only

Handling

Storage: 4 °C

Storage Comment: The kit should be stored the kit at 4°C and the microtiter plate should be kept in a sealed bag with desiccant to minimize exposure to damp air. Test kit will remain stable until the expiration date provided that the components are stored as described above.

Expiry Date: The expiry date is stated on the label.

Target Details

Target: Murinoglobulin

Background: Murinoglobulin is a negative acute phase reactant, the levels of which decrease in rat serum or plasma as a result of injury, infection or disease. In a rat adjuvant induced arthritis model murinoglobulin levels decrease by approximately eight fold. Murinoglobulin therefore provides an excellent marker of inflammation/disease in rats.