Haptoglobin ELISA Kit

Catalog No. ABIN612776

Product Details Haptoglobin ELISA Kit

Target: Haptoglobin (HP)

Reactivity: Rat

Detection Method: Colorimetric

Method Type: Competition ELISA

Detection Range: 0.937-60 μg/mL

Minimum Detection Limit: 0.937 μg/mL

Application: ELISA

Purpose: The AssayMax Rat Haptoglobin ELISA (Enzyme-Linked Immunosorbent Assay) kit is designed for detection of rat haptoglobin in plasma and serum samples. This assay employs a quantitative competitive enzyme immunoassay technique that measures rat haptoglobin in approximately 3 hours. A polyclonal antibody specific for rat haptoglobin has been pre-coated onto a 96-well microplate with removable strips. Haptoglobin in standards and samples is competed with a biotinylated haptoglobin sandwiched by the immobilized antibody and streptavidin-peroxidase conjugate. All unbound material is washed away and a peroxidase enzyme substrate is added. The color development is stopped and the intensity of the color is measured.

Brand: AssayMax™

Sample Type: Plasma, Serum

Analytical Method: Quantitative

Components: Rat Haptoglobin Microplate: A 96-well polystyrene microplate (12 strips of 8 wells) coated with a polyclonal antibody against rat haptoglobin. 2 Sealing Tapes: Each kit contains 3 precut, pressure sensitive sealing tapes that can be cut to fit the format of the individual assay. Rat Haptoglobin Standard: Rat haptoglobin in a buffered protein base (480 g, lyophilized). Biotinylated Rat Haptoglobin: 1 vial, lyophilized. EIA Diluent Concentrate (10x): A 10-fold concentrated buffered protein base (30 ml). Wash Buffer Concentrate (20x): A 20-fold concentrated buffered surfactant (30 ml). Streptavidin-Peroxidase Conjugate (SP Conjugate): A 100-fold concentrate (80 l). Chromogen Substrate: A ready-to-use stabilized peroxidase chromogen substrate tetramethylbenzidine (8 ml). Stop Solution: A 0.5 N hydrochloric acid to stop the chromogen substrate reaction (12 ml).

Material not included: Microplate reader capable of measuring absorbance at 405 nm. Pipettes (1-20 µL, 20-200 µL, and multiple channel). Deionized or distilled reagent grade water. Incubator (37 °C)

Application Details

Sample Volume: 25 μL

Assay Time: 3 h

Plate: Pre-coated

Protocol:

• Step 1. Add 25 μL of Standard or Sample and 25 μL of Biotinylated Protein per well. Incubate 2 hours.
• Step 2. Wash, then add 50 μL of SP Conjugate per well. Incubate 30 minutes.
• Step 3. Wash, then add 50 μL of Chromogen Substrate per well. Incubate 7 minutes.
• Step 4. Add 50 μL of Stop Solution per well. Read at 450 nm immediately.

Reagent Preparation:

Freshly dilute all reagents, and bring all reagents to room temperature before use. EIA Diluent Concentrate (10x): If crystals have formed in the concentrate, mix gently until the crystals have completely dissolved. Dilute the EIA Diluent Concentrate 10-fold with reagent grade water. Store for up to 30 days at 2-8 °C.

Sample Collection: Plasma: Collect plasma using one-tenth volume of 0.1 M sodium citrate as an anticoagulant. Centrifuge samples at 3000 x g for 10 minutes. A 250-fold sample dilution is suggested into EIA Diluent, however, user should determine optimal dilution factor depending on application needs. The undiluted samples can be stored at -20 °C or below for up to 3 3 months. Avoid repeated freeze-thaw cycles (EDTA or Heparin can also be used as an anticoagulant). Serum: Samples should be collected into a serum separator tube. After clot formation, centrifuge samples at 3000 x g for 10 minutes, and remove serum. A 250-fold sample dilution is suggested into EIA Diluent, however, user should determine optimal dilution factor depending on application needs. The undiluted samples can be stored at -20 °C or below for up to 3 months. Avoid repeated freeze-thaw cycles. Refer to Sample Dilution Guidelines below for further instruction. Guidelines for Dilutions of 100-fold or Greater (for reference only, please follow the insert for specific dilution suggested) 100x 10000x A) 4 μL sample: 396 μL buffer (100x) = 100-fold dilution Assuming the needed volume is less than or equal to 400 μL. A) 4 μL sample : 396 μL buffer (100x) B) 4 μL of A : 396 μL buffer (100x) = 10000-fold dilution Assuming the needed volume is less than or equal to 400 μL. 1000x 100000x A) 4 μL sample : 396 μL buffer (100x) B) 24 μL of A : 216 μL buffer (10x) = 1000-fold dilution Assuming the needed volume is less than or equal to 240 μL. A) 4 μL sample : 396 μL buffer (100x) B) 4 μL of A : 396 μL buffer (100x) C) 24 μL of B : 216 μL buffer (10x) = 100000-fold dilution Assuming the needed volume is less than or equal to 240 μL.

Assay Procedure:

Prepare all reagents, standard solutions, and samples as instructed. Bring all reagents to room temperature before use. The assay is performed at room temperature (20-25 °C). Remove excess microplate strips from the plate frame and return them immediately to the foil pouch with desiccants inside. Reseal the pouch securely to minimize exposure to water vapor and store in a vacuum desiccator. Add 25 l of Rat Haptoglobin Standard or sample per well, and immediately add 25 l of Biotinylated Rat Haptoglobin to each well (on top of the standard or sample) and tap plate to mix gently. Cover wells with a sealing tape and incubate for 2 hours. Start the timer after the last addition. Wash five times with 200 l of Wash Buffer manually. Invert the plate each time and decant the contents, hit 4-5 times on absorbent material to completely remove the liquid. If using a machine, wash six times with 300 l of Wash Buffer and then invert the plate, decanting the contents, hit 4-5 times on absorbent material to completely remove the liquid. 5 Add 50 l of Streptavidin-Peroxidase Conjugate to each well and incubate for 30 minutes. Turn on the microplate reader and set up the program in advance. Wash the microplate as described above. Add 50 l of Chromogen Substrate per well and incubate for 7 minutes or till the optimal blue color density develops. Gently tap plate to ensure thorough mixing and break the bubbles in the well with pipette tip. Add 50 l of Stop Solution to each well. The color will change from blue to yellow. Read the absorbance on a microplate reader at a wavelength of 450 nm immediately. If wavelength correction is available, subtract readings at 570 nm from those at 450 nm to correct optical imperfections. Otherwise, read the plate at 450 nm only. Please note that some unstable black particles may be generated at low concentration points after stopping the reaction for about 10 minutes, which will reduce the readings.

Calculation of Results:

• Calculate the mean value of the duplicate or triplicate readings for each standard and sample.
• To generate a standard curve, plot the graph using the standard concentrations on the x-axis and the corresponding mean 450 nm absorbance (OD) on the y-axis. The best-fit line can be determined by regression analysis using log-log or four-parameter logistic curve-fit.
• Determine the unknown sample concentration from the standard curve and multiply the value by the dilution factor.

Assay Precision: Intra-assay and inter-assay coefficients of variation were 5.1% and 8.0% respectively.

Restrictions: For Research Use only

Handling

Handling Advice: This product is for Research Use Only and is not intended for use in diagnostic procedures. Prepare all reagents (diluent buffer, wash buffer, standard, biotinylated protein, and SP conjugate) as instructed, prior to running the assay. Prepare all samples prior to running the assay. The dilution factors for the samples are suggested in this insert. However, the user should determine the optimal dilution factor. Spin down the SP conjugate vial before opening and using contents. The Stop Solution is an acidic solution. The kit should not be used beyond the expiration date.

Storage: 4 °C/-20 °C

Storage Comment: Upon arrival, immediately store components of the kit at recommended temperatures up to the expiration date. Store SP Conjugate at -20°C. Store Microplate, Diluent Concentrate (10x), Wash Buffer, Stop Solution, and Chromogen Substrate at 2-8°C. Unused microplate wells may be returned to the foil pouch with the desiccant packs and resealed. May be stored for up to 30 days in a vacuum desiccator. Diluent (1x) may be stored for up to 30 days at 2-8°C. Store Standard and Biotinylated Protein at 2-8°C before reconstituting with Diluent and at -20°C after reconstituting with Diluent.

Target Details for Haptoglobin

Target: Haptoglobin (HP)

Alternative Name: Haptoglobin (HP Products)

Synonyms: HP ELISA Kit, wu:fb64e01 ELISA Kit, BP ELISA Kit, HP2ALPHA2 ELISA Kit, HPA1S ELISA Kit, HP-1 ELISA Kit, HPR ELISA Kit, Zonulin ELISA Kit, haptoglobin ELISA Kit, haptoglobin-like ELISA Kit, HP ELISA Kit, hp ELISA Kit, Hp ELISA Kit, LOC479668 ELISA Kit, LOC101102413 ELISA Kit

Background: Haptoglobin (Hp, Zonulin, Liver regeneration-related protein LRRG173) is a plasma protein with hemoglobin-binding capacity and a plasma glycoprotein that forms a stable complex with hemoglobin to aid the recycling of heme iron (1).

Gene ID: 24464

UniProt: P06866

Pathways: Transition Metal Ion Homeostasis