SKU: 7189421758

Human FCRL3 ELISA Kit

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Description

Human FCRL3 ELISA KitProduct Specification Usage Required experimental equipment: 1. Microplate reader (450nm) 2. High precision pipettes and pipette tips: 0. 5 10uL, 5 50uL, 20 200uL, 200 1000uL 3. 37C incubator 4. Distilled or deionized water Sample preparation and requirements: Tissue homogenization: Rinse the tissue with pre chilled PBS (0. 01M, pH 7. 4) to remove residual blood (lysed red blood cells in the homogenate will affect the measurement results). Weigh and

Product Specification

Usage Required experimental equipment:
1. Microplate reader (450nm)
2. High-precision pipettes and pipette tips: 0.5-10uL, 5-50uL, 20-200uL, 200-1000uL
3. 37°C incubator
4. Distilled or deionized water

Sample preparation and requirements:
Tissue homogenization: Rinse the tissue with pre-chilled PBS (0.01M, pH 7.4) to remove residual blood (lysed red blood cells in the homogenate will affect the measurement results). Weigh and mince the tissue. Add the minced tissue to the appropriate volume of PBS (generally a 1:9 weight-to-volume ratio, e.g., 1g of tissue sample to 9mL of PBS. The specific volume can be adjusted according to experimental needs and recorded. It is recommended to add protease inhibitors to the PBS) in a glass homogenizer and grind thoroughly on ice. To further lyse tissue cells, the homogenate can be sonicated or repeatedly frozen and thawed. Finally, centrifuge the homogenate at 5000×g for 5-10 minutes, and collect the supernatant for analysis.

Cell Lysis Buffer: Adherent cells should be gently washed with pre-chilled PBS, then trypsinized and harvested by centrifugation at 1000×g for 5 minutes. Suspension cells can be harvested directly by centrifugation. Collected cells should be washed three times with pre-chilled PBS and resuspended in 150-200 μL of PBS per 1×10^6 cells (it is recommended to add protease inhibitors to the PBS; if the cell count is very low, reduce the PBS volume appropriately). Disrupt the cells by repeated freezing and thawing or sonication. Centrifuge the extract at 1500×g for 10 minutes at 2-8°C, and collect the supernatant for analysis.

Other biological fluids: Centrifuge at 1000xg for 20 minutes, remove the supernatant, and test.

Pre-test preparation:
1. Remove the test kit from the refrigerator 10 minutes in advance and equilibrate to room temperature.
2. Prepare the standard gradient working solution: Add 1 mL of universal diluent to the lyophilized standard, let it stand for 15 minutes to completely dissolve, then gently mix (concentration is 10 ng/mL). Then dilute to the following concentrations: 10 ng/mL, 5 ng/mL, 2.5 ng/mL, 1.25 ng/mL, 0.625 ng/mL, 0.3125 ng/mL, 0.15625 ng/mL, and 0 ng/mL. Serial dilution method: Take seven EP tubes and add 500uL of universal diluent to each. Pipette 500uL of the 10ng/mL standard working solution into the first EP tube and mix thoroughly to make a 5ng/mL standard working solution. Repeat this procedure for subsequent tubes. The last tube serves as a blank well; there is no need to pipette liquid from the penultimate tube. See the figure below for details.
3. Preparation of biotinylated detection antibody working solution: Centrifuge the concentrated biotinylated antibody at 1000×g for 1 minute 15 minutes before use. Dilute the 100× concentrated biotinylated antibody to a 1× working concentration with universal diluent (e.g., 10uL concentrate + 990uL universal diluent). Prepare and use immediately.
4. Prepare the enzyme conjugate working solution: 15 minutes before use, centrifuge the 100× concentrated enzyme conjugate at 1000×g for 1 minute. Dilute the 100× concentrated HRP enzyme conjugate to a 1× working concentration with universal diluent (e.g., 10 μL of concentrate + 990 μL of universal diluent). Prepare immediately.
5. Prepare the 1× wash solution: Dispense 10 mL of 20× wash solution into 190 mL of distilled water (concentrated wash solution removed from the refrigerator may crystallize; this is normal. Allow to stand at room temperature until the crystals have completely dissolved before preparing).

Procedure:
1. Remove the desired strips from the aluminum foil bag after equilibration at room temperature for 10 minutes. Seal the remaining strips in a ziplock bag and return to 4°C.
2. Sample addition: Add 100 μL of sample or standard of varying concentrations to the corresponding wells. Add 100 μL of universal diluent to the blank wells. Cover with a film and incubate at 37°C for 60 minutes. (Recommendation: Dilute the sample to be tested at least 1-fold with universal diluent before adding it to the ELISA plate. This will reduce the impact of matrix effects on the test results. The sample concentration should be multiplied by the corresponding dilution factor when calculating the final sample concentration. It is recommended to run replicates for all test samples and standards.)
3. Add Biotinylated Antibody: Remove the ELISA plate and discard the liquid without washing. Add 100 μL of Biotinylated Antibody Working Solution directly to each well. Cover with a film and incubate at 37°C for 60 minutes.
4. Wash: Discard the liquid and add 300 μL of 1x Wash Solution to each well. Let stand for 1 minute, shake off the wash solution, and pat dry on absorbent paper. Repeat this process three times (a plate washer can also be used).
5. Add Enzyme Conjugate Working Solution: Add 100 μL of Enzyme Conjugate Working Solution to each well. Cover with a film and incubate at 37°C for 30 minutes.
6. Washing: Discard the liquid and wash the plate five times as in step 4.
7. Adding substrate: Add 90 μL of substrate (TMB) to each well, cover with a sealing film, and incubate at 37°C in the dark for 15 minutes.
8. Adding stop solution: Remove the ELISA plate and add 50 μL of stop solution directly to each well. Immediately measure the OD value of each well at a wavelength of 450 nm.

Calculating experimental results:
1. Calculate the average OD value of the standard and sample replicates and subtract the OD value of the blank well as a correction factor. Plot the standard curve of the four-parameter logistic function on double-logarithmic graph paper, with concentration as the horizontal axis and OD value as the vertical axis.
2. If the sample OD value is higher than the upper limit of the standard curve, dilute the sample appropriately and retest. Multiply the sample concentration by the corresponding dilution factor.

Theory This kit uses a double-antibody sandwich enzyme-linked immunosorbent assay (ELISA). Sample, standard, biotin-labeled detection antibody, and HRP conjugate are sequentially added to microwells pre-coated with an Fc receptor-like protein 3 (FCRL3) capture antibody. After incubation and washing, the sample is developed using the substrate TMB. TMB is converted to blue by HRP peroxidase and to yellow by acid. The intensity of the color is positively correlated with the amount of Fc receptor-like protein 3 (FCRL3) in the sample. The absorbance (OD) is measured at 450 nm using a microplate reader to calculate the sample concentration.
Source Human
Synonym Human Fc receptor-like protein 3 ELISA Kit
Detection Type Double antibody sandwich method
Composition
Name 9 6 T  match   set remark
Pre-coating 96 Well plate 8 Hole ×12 Strip without
Standard 2 branch
Dilute as per instructions
Universal diluent
2×20mL
without
Concentrated biotinylated antibody ( 100× )  
120uL
Dilute as per instructions
Concentrated enzyme conjugate ( 100× )
120uL
Dilute as per instructions
20× Washing liquid
2×10mL
Dilute as per instructions
Bottom thing ( TMB )
10mL
without
Stop liquid
6mL
without
Sealing film
4 Zhang
without
Instructions
1 Share
without
Background Fc receptor-like protein 3 (FCRL3) is a protein encoded by the FCRL3 gene. This gene encodes a member of the immunoglobulin receptor superfamily and is one of several Fc receptor-like glycoproteins clustered on the long arm of chromosome 1. The encoded protein contains immunoreceptor tyrosine-based activation motifs (ITAMs) and immunoreceptor tyrosine-based inhibitory motifs (ITIMs) in its cytoplasmic domain and may play a role in regulating the immune system. Mutations in this gene have been associated with rheumatoid arthritis, autoimmune thyroid disease, and systemic lupus erythematosus.
General Notes 1. Strictly adhere to the specified incubation time and temperature to ensure accurate results. All reagents must be at room temperature (20-25°C) before use. Refrigerate reagents immediately after use.
2. Improper plate washing may result in inaccurate results. Ensure that all liquid in the wells is aspirated thoroughly before adding substrate. Do not allow the wells to dry out during incubation.
3. Remove any residual liquid and fingerprints from the bottom of the plate, as this will affect the OD value.
4. The substrate developer solution should be colorless or very light in color. Do not use substrate solution that has turned blue.
5. Avoid cross-contamination of reagents and specimens to prevent erroneous results.
6. Avoid direct exposure to strong light during storage and incubation.
7. Do not expose any reagents to bleaching solvents or the strong fumes emitted by bleaching solvents. Any bleaching agent will destroy the biological activity of the reagents in the kit.
8. Do not use expired products, and do not mix components with different product numbers and batches.
9. Recombinant proteins from sources other than the kit may not be compatible with the antibodies in this kit and will not be recognized.
10. If there is a possibility of disease transmission, all samples should be managed properly and samples and testing devices should be handled according to prescribed procedures.
Storage Temp. If the unopened kit is stored at 4°C, the shelf life is 6 months.
Test Range 0.156-10 ng/mL
Applications Tissue homogenates, cell lysates, and other biological fluids
Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 7189421758

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4.8 ★★★★★
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REJ
New York, US
★★★★★ 5
Thick indoor balls, of a darker pink color.
Style: 6 - Pack, Color: Pink
Good indoor pickleballs. The description said they were outdoor (thin crisp plastic) but they are thicker. By the picture on my pc monitor, they looked brighter pink than they actually are. I was hoping to use these outdoors in the early morning rising sun, on a blue court with yellow green edging, but the color is too dark to be of use. So when we move indoors for winter, we will use these indoor balls there. They arrived quickly and were well packaged.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 24, 2025
M
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MARGARET GARCIA
Omaha, US
★★★★★ 5
Great but hard to see when playing!
Style: 6 - Pack, Color: Purple
The balls are great but when playing with them, if you wear glasses the ball is a little hard to see. We played with the orange, yellow and green balls, which are easier on the eyes. Otherwise, the balls are great! 😍
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Reviewed in the United States on November 6, 2025
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CCH
New York, US
★★★★★ 5
Great value
Style: 6 - Pack, Color: Purple
Although pickle ball snobs have told me these are NOT proper outdoor balls, I love them! Not only are they a fantastic color but I like the weight of them and they are great for outdoor play. As a bonus, they are well-priced, so I feel I got bang for my buck.
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Reviewed in the United States on August 5, 2025
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Verified Purchase
SKJ Home & Efficiency
Lowell, US
★★★★★ 4
Bright color easy to see but not a great bounce on the outdoor court
Style: 6 - Pack, Color: Pink
I liked the fact that these balls were a bright color and easy to see but the bounce on them was not as good as other name brands. They were OK as a back-up and performed better outside then on the indoor courts which are made of a different surface. We are using them , but would most likely not repurchase.
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Reviewed in the United States on January 1, 2026
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Verified Purchase
Vivvy
West Palm Beach, US
★★★★★ 5
Price was best I found for quantity anywhere
Style: 6 - Pack, Color: Purple
I am a beginner and by no means an expert, but these balls appear to be as any other. The couple at the next court had a Franklin ball that came our way, and I bounced it and popped it back - I couldn't tell any difference in that instance. Sports stores had just one color - yellow (maybe one had chartreuse) amazon has single colors multiple - I thought it was worth this purchase. The purple may be harder to see on cloudy days - as I had on sunglasses and I could see it, but the fence at the court has a "privacy" net, it kinda bleneded in for a very brief moment until the sound was heard of the return, then no problem.
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Reviewed in the United States on May 3, 2026

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