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Description
Human H+/peptide transporter 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 20 ng/mL). Then dilute to the following concentrations: 20 ng/mL, 10 ng/mL, 5 ng/mL, 2.5 ng/mL, 1.25 ng/mL, 0.625 ng/mL, 0.3125 ng/mL, and 0 ng/mL. Serial dilution method: Take 7 EP tubes and add 500 μL of universal diluent to each tube. Pipette 500 μL of the 20 ng/mL standard working solution into the first EP tube and mix thoroughly to make a 10 ng/mL standard working solution. Repeat this procedure for subsequent tubes. The last tube serves directly as a blank well; there is no need to aspirate the liquid from the penultimate tube. See the figure below for details. 3. Preparation of Biotinylated Antibody Working Solution: 15 minutes before use, centrifuge the concentrated biotinylated antibody at 1000×g for 1 minute. Dilute the 100× concentrated biotinylated antibody to a 1× working concentration using universal diluent (e.g., 10µL concentrate + 990µL universal diluent). Prepare immediately before use. 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. |
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| 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 a capture antibody against Solute carrier family 15 (H+/peptide transporter), member 2 (HPEPT2). After incubation and washing, the sample is developed using the substrate TMB. TMB is converted to blue by HRP catalysis and to yellow by acid. The intensity of the color is positively correlated with the amount of Solute carrier family 15 (H+/peptide transporter), member 2 (HPEPT2) in the sample. The absorbance (OD) is measured at 450 nm using a microplate reader to calculate the sample concentration. | |||||||||||||||||||||||||||||||||
| Source | Human | |||||||||||||||||||||||||||||||||
| Synonym | Human Solute carrier family 15 , member 2 (HPEPT2) ELISA Kit | |||||||||||||||||||||||||||||||||
| Detection Type | Double antibody sandwich method | |||||||||||||||||||||||||||||||||
| Composition |
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| Background | Hydrogen ion/peptide transporter 2 (HPEPT2), also known as solute carrier family 15 member 2, is an enzyme encoded by the SLC15A2 gene. It is a proton-coupled amino acid transporter that transports oligopeptides of 2 to 4 amino acids, with a preference for dipeptides. It transports the dipeptide-like aminopeptidase inhibitor bestatin, the aminocephalosporin antibiotic cefadroxil, and carnosine. It participates in innate immunity by facilitating the detection of microbial pathogens by NOD-like receptors. It may function by mediating the transport of bacterial peptidoglycans across the plasma membrane, catalyzing the transport of certain bacterial peptidoglycans, such as muramyl dipeptide (MDP), a NOD2 ligand. | |||||||||||||||||||||||||||||||||
| 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. |
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| Storage Temp. | If the unopened kit is stored at 4°C, the shelf life is 6 months. | |||||||||||||||||||||||||||||||||
| Test Range | 0.312-20 ng/mL | |||||||||||||||||||||||||||||||||
| Applications | Tissue homogenates, cell lysates, and other biological fluids |
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4.6 ★★★★★
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Product Reviews
★★★★★ 4
Works well!
Size: 8 Fl Oz (Pack of 1)
So far I like this! It is runnier than normal lotion so you don’t need as much. The only thing I don’t like it smells like baby powder to me. But it does work really well with tans!
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Reviewed in the United States on June 2, 2025
★★★★★ 5
Love this lotion!!!
Size: 4 Fl Oz (Pack of 1)
The first bottle I received had leaked all over the inside of the package but I sent that back and got a replacement. I love this lotion. I actually first purchased it while I was in Maui 10 years ago. I love the scent of it and it really moisturizes my skin after sunning.
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Reviewed in the United States on August 7, 2025
★★★★★ 5
Absolutely the best, no joke
We actually lived on Maui when we discovered Maui Babe, and have been using it ever since. Let me tell you: it is the BEST after sun lotion, bar none. Got a little over-exposed, and are red and hurting? Throw some Maui Babe on, and not only will it relieve the pain (and eventual itching) of sunburn, it'll help prevent peeling later on. It's great as an every day lotion, of course, but it really shines on sunburn. My husband and I laugh about steering many a sunburned tourist to the Maui Babe display in stores all over Hawaii. "Hey, you really need to get some of THIS for that burn." They always seemed grateful to get steered to something that really worked, instead of the usual lotions and potions that didn't. Anyway, I can highly recommend it, been using it for years, and as a blonde who has lived in Hawaii, southwest Florida, and now down in Panama (where the sun is damned close), I can tell you that it really works. And yes...my last order came all the way to Panama because I can't do without it.
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Reviewed in the United States on July 26, 2022
★★★★★ 5
Love This for my Spring and Summer Tanning, I Tan Easy but Real Good to Use
Size: 8 Fl Oz (Pack of 1)
My skin tans pretty easy but I like to limit the amount of direct sun exposure, and this product helps me do that, all my friends use and it popular with many young girls, don't know about guys but, oh well.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Great product!
Style: Deep Moisturizing, Size: 1.76 Fl Oz (Pack of 1)
I love this stuff! My mom introduced this to me while I was visiting her, and within 3 days of using it I knew I needed to order one for myself. It has no smell, goes on buttery soft, and soaks in well. It is not heavy at all. At night I layer it on thicker and during the day I put a very thin layer on under my makeup. My skin is so much softer and hydrated. I have had small bumps on my cheeks for so long and they were gone within 3 days. My skin looks dewy and soft.
I read reviews of other brands that smelled, were oily, or too heavy. This is none of those things and it is a great price!
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Reviewed in the United States on March 25, 2026
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