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Product Info Summary
| SKU: | EK1595 |
|---|---|
| Size: | 96 wells/kit, with removable strips. |
| Reactive Species: | Rat |
| Application: | ELISA |
| Sample Types: | cell culture supernatants, serum and plasma (heparin, EDTA). |
Product info
Product Name
Rat FGF21 ELISA Kit PicoKine®
SKU/Catalog Number
EK1595
Size
96 wells/kit, with removable strips.
*Question: How many samples can I assay/run in this kit?
Description
Rat FGF21 ELISA Kit PicoKine® (96 Tests). Quantitate Rat FGF21 in cell culture supernatants, serum and plasma (heparin, EDTA). Sensitivity: 10pg/ml . The brand Picokine indicates this is a premium quality ELISA kit. Each Picokine kit delivers precise quantification, high sensitivity, and excellent reproducibility. Only our most reliable and effective kits qualify as Picokine, guaranteeing top-tier results for your assays.
Storage & Handling
Store at 4°C for 6 months, at -20°C for 12 months. Avoid multiple freeze-thaw cycles (Ships with gel ice, can store for up to 3 days in room temperature. Freeze upon receiving.)
Cite This Product
Rat FGF21 ELISA Kit PicoKine® (Boster Biological Technology, Pleasanton CA, USA, Catalog # EK1595)
Clonality of Antibodies
See Datasheet for details
Standard Protein
Expression system for standard: E.coli; Immunogen sequence: Y30-S208
Sensitivity
<10 pg/ml
Assay Range
31.2 pg/ml - 2,000 pg/ml
Standard Dilution Instructions
See datasheet of EK1595 for more details
Cross-reactivity
There is no detectable cross-reactivity with other relevant proteins.
Reactive Species
EK1595 is reactive to FGF21 in Rat samples
Validated Sample Types
cell culture supernatants, serum and plasma (heparin, EDTA).
Application Guarantee
EK1595 is guaranteed for ELISA in Rat by Boster Guarantee
See how Boster Bio validate our ELISA kits: ELISA Validation Information
Background of FGF-21
Fibroblast growth factor 21 is a protein that in humans is encoded by the FGF21 gene. By genomic sequence analysis, Nishimura et al. (2000) identified the FGF21 gene within the 5-prime flanking region of the FUT1 gene on chromosome 19. The protein encoded by this gene is a member of the fibroblast growth factor (FGF) family. FGF family members possess broad mitogenic and cell survival activities and are involved in a variety of biological processes including embryonic development, cell growth, morphogenesis, tissue repair, tumor growth and invasion. FGF21 stimulates glucose uptake in adipocytes but not in other cell types. This effect is additive to the activity of insulin. FGF21 treatment of adipocytes is associated with phosphorylation of FRS2, a protein linking FGF receptors to the Ras/MAP kinase pathway. FGF21 injection in ob/ob mice results in an increase in Glut1 in adipose tissue. FGF21 also protects animals from diet-induced obesity when overexpressed in transgenic mice and lowers blood glucose and triglyceride levels when administered to diabetic rodents.
Kit Components
| Catalog Number | Description | Quantity |
|---|---|---|
| EK1595-CAP | Anti-Rat FGF21 Pre-coated 96-well strip microplate | 1 |
| EK1595-ST | Rat FGF21 Standard | 2 vials, 10 ng/tube |
| EK1595-DA | Rat FGF21 Biotinylated antibody (100x) | 100ul |
| AR1103 | Avidin-Biotin-Peroxidase Complex (100x) | 100ul |
| AR1106-1 | Sample Diluent | 30ml |
| AR1106-2 | Antibody Diluent | 12ml |
| AR1106-3 | Avidin-Biotin-Peroxidase Diluent | 12ml |
| AR1104 | Color Developing Reagent (TMB) | 10ml |
| AR1105 | Stop Solution | 10ml |
| AR1106-5 | Wash Buffer (25x) | 20ml |
| PLA-SEA | Adhesive plate sealers | 4 |
*The kit components are not available for individual purchase.
Materials Required But Not Included In Kit
- Microplate Reader capable of reading absorbance at 450nm.
- Incubator.
- Automated plate washer (optional).
- Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions.
- Multichannel pipettes are recommended for large amount of samples.
- Deionized or distilled water.
- 500ml graduated cylinders.
- Test tubes for dilution.
Data Examples, Quality Control Data & Sample Dilution
Validation Standard Curve O.D. At 450nm
| Concentration (pg/ml) | 0 | 31.2 | 62.5 | 125 | 250 | 500 | 1000 | 2000 |
| O.D. | 0.017 | 0.052 | 0.108 | 0.179 | 0.279 | 0.578 | 1.016 | 1.805 |
Data Example Images
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Rat FGF21 PicoKine ELISA Kit standard curve
Recommended Sample Dilution Ratios
According to our internal validation assays using this ELISA kit, to detect FGF-21, Dilution ratio of 1:1, concentration in serum and plasma is around 400 pg/ml..
Intra Assay Consistency & Inter Assay Consistency
We measured random samples of Rat FGF21 ELISA Kit PicoKine® within the same batch/lot to ensure the consistency of the kits' performances. ELISA intra assay consistency is measured using wells from the same plate/assay kit. ELISA inter assay consistency is measured using wells from different plates from the same batch production/lot.
| Intra-Assay Precision | Inter-Assay Precision | |||||
|---|---|---|---|---|---|---|
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 16 | 16 | 16 | 24 | 24 | 24 |
| Mean (pg/ml) | 50 | 155 | 638 | 57 | 172 | 749 |
| Standard deviation | 2.10 | 6.67 | 30.62 | 2.79 | 11.01 | 58.42 |
| CV (%) | 4.2% | 4.3% | 4.8% | 4.9% | 6.4% | 7.8% |
Reproducibility
We ensure reproducibility by testing three samples with differing concentrations of FGF-21 in ELISA kits from four different production batches/lots.
| Lots | Lot 1 (pg/ml) | Lot 2 (pg/ml) | Lot 3 (pg/ml) | Lot 4 (pg/ml) | Mean (pg/ml) | Standard Deviation | CV (%) |
|---|---|---|---|---|---|---|---|
| Sample 1 | 50 | 48 | 42 | 44 | 46 | 3.16 | 6.8% |
| Sample 2 | 155 | 181 | 179 | 185 | 175 | 11.74 | 6.7% |
| Sample 3 | 638 | 762 | 636 | 688 | 681 | 51.19 | 7.5% |
Protein Target Info & Infographic
Gene/Protein Information For FGF21 (Source: Uniprot.Org, NCBI)
Gene Name
FGF21
Full Name
Fibroblast growth factor 21
Weight
22.3kDa
Superfamily
heparin-binding growth factors family
Alternative Names
Fibroblast growth factor FGF21 fibroblast growth factor 21 fibroblast growth factor 21
*if product is indicated to react with multiple species, protein info is based on the gene entry specified above in "species".For more info on FGF21, check out the FGF21 Infographic
We have 30,000+ of these available, one for each gene! check them out.
In this infographic you will see the following information for FGF21: database IDs, super-family, protein function, synonyms, molecular weight, chromosomal locations, tissues of expression, subcellular locations, post translational modifications, and related diseases, research areas & pathways. If you want to see more information included, or would like to contribute to it and be acknowledged, please contact us [email protected].
Specific Publications For Rat FGF21 ELISA Kit PicoKine® (EK1595)
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Customer Reviews
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Customer Q&As
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6 Customer Q&As for Rat FGF21 ELISA Kit PicoKine®
Question
Q: if the enzyme conjugated FGF-21 antibodies are mixed with the substrate, will that change the substrate into the enzymatic reaction product? Or the enzyme function is only activated when the antibody is attached with the FGF-21 antigen?
Verified Customer
Verified customer
Asked: 2020-03-02
Answer
A: The enzyme is always active. Avoid contaminating the substrate with enzyme prior to the incubation otherwise it compromises the assay with false positive signal.
Boster Scientific Support
Answered: 2020-03-02
Question
Q: how to proceed with the analysis of ELISA data? I have performed FGF-21 level in plasma .
Verified Customer
Verified customer
Asked: 2019-05-26
Answer
A: we recommend you this article on ELISA data analysis. bosterbio.com/ELISA-data-analysis-instructions. we also provide a convenient online tool that you can use to analyze ELISA data. bosterbio.com/biology-research-tools/ELISA-data-analysis-online
Boster Scientific Support
Answered: 2019-05-26
Question
Q: how to thaw whole blood sample for FGF-21 ELISA after freezing?
Verified Customer
Verified customer
Asked: 2019-02-17
Answer
A: do not freeze and thaw whole blood. erythrocytes are fragile and, if frozen and thawed, will undergo hemolysis rendering the samples useless. To keep your blood samples to test FGF-21 for a later time, you should let the blood clot in glass tubes and separate the serum to freeze for later analysis.
Boster Scientific Support
Answered: 2019-02-17
Question
Q: Can FGF-21 ELISA Kits be used with tissue homogenates (or other non-validated sample types)?
M. Tiwari
Verified customer
Asked: 2017-11-27
Answer
A: Unfortunately, Boster Bio has not routinely validated tissue homogenates as a sample type for ELISA kits. This does not mean that ELISA kits are not suitable for other sample types than we have tested: it means further investigation is required. One will need to perform a spike and recovery study to determine if an unvalidated sample type will work with a particular kit. To perform a spike and recovery experiment, one should divide a sample into two aliquots. In one of the aliquots, the user should spike in a known amount of the kit standard. a dilution series is performed comparing the spiked versus the unspiked sample. Generally, samples with expected recovery and linearity between 80-120% are considered acceptable. This method can be used to validate any sample type that has not been evaluated by Boster Bio. for a more detailed spike and recovery protocol, please contact technical support.
Note: acceptable ranges should be determined individually by each laboratory. Additionally, technical support can help determine if a buffer component is not compatible with a given ELISA kit. please check the Citations tab on the product webpage for peer-reviewed papers utilizing a wide range of sample types. We also have an innovator's reward program where if the user validates our ELISA kits in applications or samples previously not validated by Boster Bio or other users, and share such information with us by submit a review, we will reward the user's efforts with a free antibody or ELISA kit from our catalog. Biocompare.com will also give $20 Amazon giftcard as an additional reward, if the review is submitted there as well.
Boster Scientific Support
Answered: 2017-11-27
Question
Q: is there any online tool I can use to streamline the data analysis for my ELISA results?
P. Gandhi
Verified customer
Asked: 2017-11-25
Answer
A: We have a web based ELISA curve fitting (4pl) and data analysis tool. Please give it a try: bosterbio.com/biology-research-tools/ELISA-data-analysis-online. You can also consult our article on ELISA data analysis: bosterbio.com/ELISA-data-analysis-instructions
Boster Scientific Support
Answered: 2017-11-25
Question
Q: What is the optimal O.D. value for FGF-21 ELISA kit? I used your FGF-21 ELISA on serum samples. For my positive control, I received an O.D. value of 0.826, while my negative control received a value of 0.136. I obtained both of these controls from the ELISA kit, where your kit's typical data shows O.D. values much higher than my positive control and your background is lower. My samples O.D. values are around 0.225 and the highest is only 0.357. can I consider these samples contain FGF-21 even though the O.D. values are not very high?
Verified Customer
Verified customer
Asked: 2014-02-10
Answer
A: The absolute O.D. values may change according to incubation time. The more you incubate the higher the O.D. values are going to be. an important assessment should be is whether your sample O.D. values are statistically significantly higher than your blank values. regarding your protocol, you could extend your development time in the substrate incubation step to obtain higher O.D. values, as long as your negative controls' O.D. values are not increasing faster in proportion to your positive controls. typically, a sample with O.D. value 2 standard deviations higher than your negative controls can be considered positive. We calculate the sensitivity of this ELISA kit by converting cutoff O.D. value, calculated as the average of 20 negative controls plus 2 standard deviations of the 20 negative controls, into a concentration. in other words, when we claim this FGF-21 ELISA kit to have sensitivity of 10pg/ml , that means the minimum amount of FGF-21 that can be declared/interpreted as positive by the above standard is 10pg/ml .
Boster Scientific Support
Answered: 2014-02-10
