CLIA Kit for Fibroblast Growth Factor 21 (FGF21)


This assay has high sensitivity and excellent specificity for detection of Fibroblast Growth Factor 21 (FGF21).
No significant cross-reactivity or interference between Fibroblast Growth Factor 21 (FGF21) and analogues was observed.


Matrices listed below were spiked with certain level of recombinant Fibroblast Growth Factor 21 (FGF21) and the recovery rates were calculated by comparing the measured value to the expected amount of Fibroblast Growth Factor 21 (FGF21) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 81-91 87
EDTA plasma(n=5) 80-96 84
heparin plasma(n=5) 88-97 92


Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Fibroblast Growth Factor 21 (FGF21) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Fibroblast Growth Factor 21 (FGF21) were tested on 3 different plates, 8 replicates in each plate.
CV(%) = SD/meanX100
Intra-Assay: CV<10%
Inter-Assay: CV<12%


The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Fibroblast Growth Factor 21 (FGF21) and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.

Sample 1:2 1:4 1:8 1:16
serum(n=5) 78-96% 80-90% 84-98% 79-95%
EDTA plasma(n=5) 79-88% 78-99% 93-101% 94-102%
heparin plasma(n=5) 88-102% 96-105% 78-94% 78-101%


The stability of kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition.
To minimize extra influence on the performance, operation procedures and lab conditions, especially room temperature, air humidity, incubator temperature should be strictly controlled. It is also strongly suggested that the whole assay is performed by the same operator from the beginning to the end.

Reagents and materials provided

Reagents Quantity Reagents Quantity
Pre-coated, ready to use 96-well strip plate 1 Plate sealer for 96 wells 4
Standard 2 Standard Diluent 1×20mL
Detection Reagent A 1×120µL Assay Diluent A 1×12mL
Detection Reagent B 1×120µL Assay Diluent B 1×12mL
Substrate A 1×10mL Substrate B 1×2mL
Wash Buffer (30 × concentrate) 1×20mL Instruction manual 1

Assay procedure summary

1. Prepare all reagents, samples and standards;
2. Add 100µL standard or sample to each well. Incubate 1 hours at 37°C;
3. Aspirate and add 100µL prepared Detection Reagent A. Incubate 1 hour at 37°C;
4. Aspirate and wash 3 times;
5. Add 100µL prepared Detection Reagent B. Incubate 30 minutes at 37°C;
6. Aspirate and wash 5 times;
7. Add 100µL Substrate Solution. Incubate 10 minutes at 37°C;
8. Read RLU value immediately.



Magazine Citations
Lipids in Health and Disease Dietary moderately oxidized oil induces expression of fibroblast growth factor 21 in the liver of pigs Lipidworld: source
Endocrinology Orphan nuclear receptor Nur77 mediates fasting-induced hepatic fibroblast growth factor 21 expression Endocrine:Source
Biochemical and Biophysical Research Communications Alpha lipoic acid induces hepatic fibroblast growth factor 21 expression via up-regulation of CREBH Pubmed:25449271
Free Radic Biol Med Skeletal muscle increases FGF21 expression in mitochondrial disorders to compensate for energy metabolic insufficiency by activating the mTOR–YY1–PGC1α pathway PubMed: 25843656
Journal of diabetes and its complications Associations between FGF21, osteonectin and bone turnover markers in type 2 diabetic patients with albuminuria. pubmed:27916484
Catalog No. Related products for research use of Homo sapiens (Human) Organism species Applications (RESEARCH USE ONLY!)
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PAC918Hu01 Polyclonal Antibody to Fibroblast Growth Factor 21 (FGF21) WB; IHC; ICC; IP.
FAC918Hu01 Anti-Fibroblast Growth Factor 21 (FGF21) Polyclonal Antibody Flow cytometry.
MAC918Hu22 Monoclonal Antibody to Fibroblast Growth Factor 21 (FGF21) WB; IHC; ICC; IP.
SEC918Hu ELISA Kit for Fibroblast Growth Factor 21 (FGF21) Enzyme-linked immunosorbent assay for Antigen Detection.
SCC918Hu CLIA Kit for Fibroblast Growth Factor 21 (FGF21) Chemiluminescent immunoassay for Antigen Detection.