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Index / Chondr / Human_monkey anti-bovine type II collagen IgG antibody assay kit, TMB / Product Detail : 2052T Human_monkey anti-bovine type II collagen IgG antibody assay kit, TMB
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Dec
11th

#2052T Human_monkey anti-bovine type II collagen IgG antibody assay kit, TMB

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  Price : 632   EUR
717   USD
490   GBP
2655   Zloty
84595   JPY
4875   NOK
5224   SEK
715   CHF

Product name : Human_monkey anti-bovine type II collagen IgG antibody assay kit, TMB

Catalog number : 2052T

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Availability: Yes

Supplier name : Chondr

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About this Product :

Human_monkey anti-bovine type II collagen IgG antibody assay kit, TMB antibody storage GENTAUR recommends for long therm storage to freeze at -24 C. For short time storage up to 30 days we suggest fridge storage at 1 to 10 C. Prevent multiple freeze taw cycles of Human_monkey anti-bovine type II collagen IgG antibody assay kit, TMB.
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Human_monkey anti-bovine type II collagen IgG antibody assay kit, TMB storing antibdies for longer storage periods of the Human_monkey anti-bovine type II collagen IgG antibody assay kit, TMB we recommend - 21C or lower and for short periods lees than 1 month we suggest +5C fridge temperatures.
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More Details about

Human sera, especially from patients with autoimmune diseases, contain high levels of immunoreactive components, which yield high background levels in ELISA systems. These non-specific reactions are caused by adhesive immunoglobulins contained in human serum, which strongly adhere to plastic surfaces by hydrophilic binding, and blocking agents such as bovine serum albumin (BSA) and Tween 20, are not capable of blocking these non-specific reactions at all. However, these false positive reactions caused by serum sample itself have not been understood, and are considered as a real antibodyantigen reaction in many cases, even now. In order to obtain a real value of antigen-antibody reaction, it is critical 1) to choose proper blocking agents which block these kinds of non-specific reactions effectively, 2) to determine a unique non-specific background value of individual samples using antigen-non-coated wells and 3) to subtract the background value from the value determined in antigen-coated wells. In addition, it is apparent to determine the non-specific reactions caused by secondary antibody as well. Chondrex’s ELISA system incorporates unique blocking agents that inhibit the hydrophobic binding of these serum components onto plastic surfaces and are designed
to determine the background values of individual samples using antigen-non-coated wells.


In general, antibodies to collagen in human sera are highly specific to heterologous collagen such as bovine or chick type I and/or type II collagen and cross-react to other species and types of collagen including human collagen, regardless of the disease. For example, serum antibodies even from healthy normal controls react to various species and types of collagen. To determine the human serum antibodies with a significant diversity in the antigen specificity, Chondrex provides various species of type I and type II collagen-coated strips as well as uncoated wells (see table above). This ELISA kit contains enough materials to run two plates on two separate occasions (see assay procedure) and may be used for monkey sera as well as human sera.

NOTES BEFORE USING ASSAY
Note 1: It is recommended that the standard and samples be run in duplicate.
Note 2: Partially used reagents may be kept at –20°C.
Note 3: Crystals may form in the 20X wash buffer when stored at cold temperatures. If crystals have formed, it is necessary to warm the wash buffer by placing the bottle in warm water until crystals have dissolved completely.
Note 4: Measure exact volume of buffers using a serological pipette prior to diluting. Extra buffer is provided.

 

ASSAY PROCEDURE
1. Dilute Wash Buffer: Dilute 50 ml of 20X wash buffer in 950 ml of distilled water (1X wash buffer). Wash the plate with 1X wash buffer at least 3 times using a wash bottle with manifold or an automated plate washer. Empty the plate by inverting it and blot on a paper towel to remove excess liquid. Do not allow the plate to dry out.
2. Add Blocking Buffer: Add 100 ml of Blocking Buffer (Solution A) to all wells. Incubate for 1 hour at room temperature.
3. Prepare Standard Dilutions: Undiluted standard is 16 units/ml. Prepare serial dilutions of the standard by mixing 250 ml of 16 units/ml standard with 250 ml of Sample/Standard Dilution Buffer (Solution B) - 8 units/ml. Then repeat this procedure to make five more serial dilutions of standard - 4, 2, 1, 0.5 and 0.25 units/ml solutions. The 16 units/ml standard may be stored at -20°C for use in a second assay. We recommend making fresh serial dilutions for each assay.
4. Prepare Sample Dilutions: Dilute samples 1:100 or more with Solution B. For example, dilute 20 ml of sample with 1.98 ml of Solution B (1:100). Keep this as a stock solution for future assays. If necessary, dilute the samples further with Solution B, 1:200-1:1000.
Note: Human serum samples have a high lipid content in general. In order to avoid non-specific reactions caused by lipids, centrifuge samples at 10,000 rpm for 5 minutes using a tabletop centrifuge. Take a desired volume of serum sample carefully by pipette and then wipe the pipette surface with paper.
5. Wash: Wash the plate with 1X wash buffer at least 3 times using a wash bottle with manifold or an automated plate washer. Empty the plate by inverting it and blot on a paper towel to remove excess liquid. Do not allow the plate to dry out.
6. Add Standards and Samples: Add 100 ml of standards, Solution B (blank), and samples to collagen coated and uncoated wells in duplicate. Incubate at room temperature for 2 hours.
7. Wash: Wash the plate with 1X wash buffer at least 3 times using a wash bottle with manifold or an automated plate washer. Empty the plate by inverting it and blot on a paper towel to remove excess liquid. Do not allow the plate to dry out.
8. Add Secondary Antibody: Dissolve one vial of secondary antibody in 10 ml Secondary Antibody Dilution Buffer (Solution C).
Add 100 ml of secondary antibody solution to each well and incubate at room temperature for 1 hour.
9. Wash: Wash the plate with 1X wash buffer at least 3 times using a wash bottle with manifold or an automated plate washer. Empty the plate by inverting it and blot on a paper towel to remove excess liquid. Do not allow the plate to dry out.
10. Add Streptavidin Peroxidase: Dilute one vial of Streptavidin Peroxidase in 10 ml of Streptavidin Peroxidase Dilution Buffer (Solution D). Add 100 ml of streptavidin peroxidase solution to each well and incubate at room temperature for 1 hour.
11. Wash: Wash the plate with 1X wash buffer at least 3 times using a wash bottle with manifold or an automated plate washer. Empty the plate by inverting it and blot on a paper towel to remove excess liquid. Do not allow the plate to dry out.
12. TMB: Add 100 ml of TMB solution to each well immediately after washing the plate. Incubate for 15 minutes at room temperature.
13. Stop: Add 50 ml of 2N sulfuric acid (Stop Solution) to each well.
14. Read Plate: Read the OD values at 450 nm. If the OD values of samples are greater than the OD values of the highest standard, re-assay the samples at a higher dilution. A 630 nm filter can be used as a reference.

 

CALCULATION OF ANTIBODY TITERS
1. Average the duplicate OD values for the standards, blanks (B) and test samples in uncoated wells and collagen coated wells.
2. Subtract the blank (B) values from the averaged OD values of the standards and test samples in uncoated wells and collagen coated wells.
Note: Individual antigens have unique background values. Therefore, “blank” wells should be used for each different antigen.
3. Subtract the OD values of samples tested in uncoated wells (background values) from their counterpart OD values in collagen coated wells from step 2 to eliminate values associated with non-specific reactions.
4. Plot the OD values of standards against the units/ml of antibody standard. Using a log/log plot will linearize the data. Figure 3 shows a representative experiment where the standard range is from 0.25 to 16 units/ml.
5. The units/ml of antibody in test samples can be calculated using regression analysis.
Note: 100 units is approximately 1 µg IgG antibody/ml.

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