Description
Rat SDF4 (Stromal Cell Derived Factor 4) ELISA Kit
The Rat SDF4 (Stromal Cell-Derived Factor 4) ELISA Kit is a reliable and sensitive assay designed for the accurate quantification of SDF4 levels in rat serum, plasma, and cell culture supernatants. This kit offers high specificity and precision, providing consistent and reproducible results suitable for a variety of research applications.SDF4, also known as CXCL14, is a chemokine protein that plays a key role in inflammation, wound healing, and immune response regulation.
Its dysregulation has been linked to various diseases such as cancer, autoimmune disorders, and inflammatory conditions, making it a valuable biomarker for studying disease mechanisms and potential therapeutic interventions.Overall, the Rat SDF4 ELISA Kit offers a powerful tool for researchers seeking to explore the role of SDF4 in health and disease, providing accurate quantification and reliable data for in-depth investigations.
| Assay type: | Sandwich |
| Format: | 96T |
| Assay time: | 4.5h |
| Reactivity: | Rat |
| Detection Method: | Colormetric |
| Detection Range: | 15.63-1000 pg/mL |
| Sensitivity: | 9.38 pg/mL |
| Sample Volume Required Per Well: | 100µL |
| Sample Type: | Serum, plasma and other biological fluids |
| Specificity: | This kit recognizes Rat SDF4 in samples. No significant cross-reactivity or interference between Rat SDF4 and analogues was observed. |
This ELISA kit uses Sandwich-ELISA as the method. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Rat SDF4. Standards or samples are added to the appropriate micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Rat SDF4 and Avidin-Horseradish Peroxidase (HRP) conjugate are added to each micro plate well successively and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Rat SDF4, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by adding Stop Solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Rat SDF4. The concentration of Rat SDF4 in samples can be calculated by comparing the OD of the samples to the standard curve.
| UniProt Protein Function: | SDF4: May regulate calcium-dependent activities in the endoplasmic reticulum lumen or post-ER compartment. Belongs to the CREC family. 6 isoforms of the human protein are produced by alternative splicing. |
| UniProt Protein Details: | Protein type:Calcium-binding Chromosomal Location of Human Ortholog: 5q36 Cellular Component: cytoplasm; Golgi apparatus; Golgi lumen; late endosome; membrane; plasma membrane Molecular Function:calcium ion binding; identical protein binding; protein binding Biological Process: calcium ion-dependent exocytosis; cerebellum development; exocytosis; fat cell differentiation; response to ethanol; UV protection |
| NCBI Summary: | mRNA expression increases in response to ethanol [RGD, Feb 2006] |
| UniProt Code: | Q91ZS3 |
| NCBI GenInfo Identifier: | 78126149 |
| NCBI Gene ID: | 155173 |
| NCBI Accession: | NP_569096. 2 |
| UniProt Secondary Accession: | Q91ZS3,Q5PQW3, |
| UniProt Related Accession: | Q91ZS3 |
| Molecular Weight: | 44,350 Da |
| NCBI Full Name: | 45 kDa calcium-binding protein |
| NCBI Synonym Full Names: | stromal cell derived factor 4 |
| NCBI Official Symbol: | Sdf4 |
| NCBI Protein Information: | 45 kDa calcium-binding protein |
| UniProt Protein Name: | 45 kDa calcium-binding protein |
| UniProt Synonym Protein Names: | Stromal cell-derived factor 4; SDF-4 |
| Protein Family: | 45 kDa calcium-binding protein |
| UniProt Gene Name: | Sdf4 |
As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e. g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.
| Concentration (pg/mL) | O.D | Average | Corrected |
| 1000 | 2.43 2.43 | 2.43 | 2.373 |
| 500 | 1.524 1.56 | 1.542 | 1.485 |
| 250 | 0.917 0.887 | 0.902 | 0.845 |
| 125 | 0.454 0.464 | 0.459 | 0.402 |
| 62.5 | 0.227 0.211 | 0.219 | 0.162 |
| 31.25 | 0.163 0.151 | 0.157 | 0.1 |
| 15.63 | 0.105 0.111 | 0.108 | 0.051 |
| 0 | 0.055 0.059 | 0.057 | -- |
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Rat SDF4 were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Rat SDF4 were tested on 3 different plates, 20 replicates in each plate.
| Intra-assay Precision | Inter-assay Precision | |||||
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 20 | 20 | 20 | 20 | 20 | 20 |
| Mean (pg/mL) | 51.69 | 87.44 | 463.61 | 51.01 | 92.70 | 443.97 |
| Standard deviation | 2.65 | 5.14 | 23.97 | 2.60 | 5.52 | 16.25 |
| C V (%) | 5.13 | 5.88 | 5.17 | 5.10 | 5.95 | 3.66 |
Recovery
The recovery of Rat SDF4 spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.
| Sample Type | Range (%) | Average Recovery (%) |
| Serum (n=5) | 86-99 | 91 |
| EDTA plasma (n=5) | 86-100 | 92 |
| Cell culture media (n=5) | 94-109 | 101 |
Linearity
Samples were spiked with high concentrations of Rat SDF4 and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.
| Serum (n=5) | EDTA plasma (n=5) | Cell culture media (n=5) | ||
| 1:2 | Range (%) | 96-112 | 84-97 | 87-99 |
| Average (%) | 104 | 90 | 92 | |
| 1:4 | Range (%) | 94-108 | 82-96 | 81-93 |
| Average (%) | 99 | 88 | 87 | |
| 1:8 | Range (%) | 92-105 | 81-93 | 82-95 |
| Average (%) | 98 | 86 | 88 | |
| 1:16 | Range (%) | 92-107 | 82-94 | 88-101 |
| Average (%) | 98 | 89 | 95 |
An unopened kit can be stored at 4°C for 1 month. If the kit is not used within 1 month, store the items separately according to the following conditions once the kit is received.
| Item | Specifications | Storage |
| Micro ELISA Plate(Dismountable) | 8 wells ×12 strips | -20°C, 6 months |
| Reference Standard | 2 vials | |
| Concentrated Biotinylated Detection Ab (100×) | 1 vial, 120 µL | |
| Concentrated HRP Conjugate (100×) | 1 vial, 120 µL | -20°C(shading light), 6 months |
| Reference Standard & Sample Diluent | 1 vial, 20 mL | 4°C, 6 months |
| Biotinylated Detection Ab Diluent | 1 vial, 14 mL | |
| HRP Conjugate Diluent | 1 vial, 14 mL | |
| Concentrated Wash Buffer (25×) | 1 vial, 30 mL | |
| Substrate Reagent | 1 vial, 10 mL | 4°C(shading light) |
| Stop Solution | 1 vial, 10 mL | 4°C |
| Plate Sealer | 5 pieces | |
| Product Description | 1 copy | |
| Certificate of Analysis | 1 copy |
- Set standard, test sample and control (zero) wells on the pre-coated plate and record theirpositions. It is recommended to measure each standard and sample in duplicate. Note: addall solutions to the bottom of the plate wells while avoiding contact with the well walls. Ensuresolutions do not foam when adding to the wells.
- Aliquot 100µl of standard solutions into the standard wells.
- Add 100µl of Sample / Standard dilution buffer into the control (zero) well.
- Add 100µl of properly diluted sample (serum, plasma, tissue homogenates and otherbiological fluids) into test sample wells.
- Cover the plate with the sealer provided in the kit and incubate for 90 min at 37°C.
- Aspirate the liquid from each well, do not wash. Immediately add 100µL of BiotinylatedDetection Ab working solution to each well. Cover the plate with a plate seal and gently mix. Incubate for 1 hour at 37°C.
- Aspirate or decant the solution from the plate and add 350µL of wash buffer to each welland incubate for 1-2 minutes at room temperature. Aspirate the solution from each well andclap the plate on absorbent filter paper to dry. Repeat this process 3 times. Note: a microplatewasher can be used in this step and other wash steps.
- Add 100µL of HRP Conjugate working solution to each well. Cover with a plate seal andincubate for 30 min at 37°C.
- Aspirate or decant the solution from each well. Repeat the wash process for five times asconducted in step 7.
- Add 90µL of Substrate Reagent to each well. Cover with a new plate seal and incubate forapproximately 15 min at 37°C. Protect the plate from light. Note: the reaction time can beshortened or extended according to the actual color change, but not by more than 30min.
- Add 50 µL of Stop Solution to each well. Note: Adding the stop solution should be done inthe same order as the substrate solution.
- Determine the optical density (OD value) of each well immediately with a microplate readerset at 450 nm.
