ELISA Kit for Fatty Acid Binding Protein 2, Intestinal (FABP2)

FABPI; IFABP; I-FABP; Intestinal-type fatty acid-binding protein


This assay has high sensitivity and excellent specificity for detection of Fatty Acid Binding Protein 2, Intestinal (FABP2).
No significant cross-reactivity or interference between Fatty Acid Binding Protein 2, Intestinal (FABP2) and analogues was observed.


Matrices listed below were spiked with certain level of recombinant Fatty Acid Binding Protein 2, Intestinal (FABP2) and the recovery rates were calculated by comparing the measured value to the expected amount of Fatty Acid Binding Protein 2, Intestinal (FABP2) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 78-95 91
EDTA plasma(n=5) 78-92 82
heparin plasma(n=5) 90-101 97


Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Fatty Acid Binding Protein 2, Intestinal (FABP2) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Fatty Acid Binding Protein 2, Intestinal (FABP2) 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 Fatty Acid Binding Protein 2, Intestinal (FABP2) 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) 81-96% 97-104% 78-101% 91-105%
EDTA plasma(n=5) 87-94% 82-93% 95-102% 78-95%
heparin plasma(n=5) 83-101% 91-99% 90-98% 95-103%


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
TMB Substrate 1×9mL Stop Solution 1×6mL
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 90µL Substrate Solution. Incubate 10-20 minutes at 37°C;
8. Add 50µL Stop Solution. Read at 450nm immediately.



Magazine Citations
Food Chem Cranberries (Oxycoccus quadripetalus) inhibit lipid metabolism and modulate leptin and adiponectin secretion in 3T3-L1 adipocytes PubMed: 25952883
Oxid Med Cell Longev Elevation of HO-1 Expression Mitigates Intestinal Ischemia-Reperfusion Injury and Restores Tight Junction Function in a Rat Liver Transplantation Model PubMed: 26064429
Vet Immunol Immunopathol Immunomodulatory potential of β-glucan as supportive treatment in porcine rotavirus enteritis. pubmed:28895864
PLoS One Protective effect of aplysin on liver tissue and the gut microbiota in alcohol-fed rats pubmed:28622357
Journal of Immunology and Immunopathology Effect of Porcine Rotavirus Enteritis on Concentrations of Interferonγ, Immunoglobulin-G and Intestinal Fatty Acid-Binding Protein-2 and Peripheral Leukocyte Function 10.5958/0973-9149.2017.00011.9
Cellular Physiology and Biochemistry Activated Α7nachr Improves Postoperative Cognitive Dysfunction and Intestinal Injury Induced by Cardiopulmonary Bypass in Rats: Inhibition of the Proinflammatory … Pubmed:29672286
European Journal of Clinical Nutrition Lack of liver steatosis in germ-free mice following hypercaloric diets Pubmed:29926176
Nutrients Protective Effect of Aplysin Supplementation on Intestinal Permeability and Microbiota in Rats Treated with Ethanol and Iron Pubmed:29861488
International Surgery Journal Intestinal fatty acid binding protein (I-FABP) as a marker for acute intestinal ischemia Doi: 10.18203/2349-2902.isj20190058
Hepatology Communications Effect of a Multistrain Probiotic on Cognitive Function and Risk of Falls in Patients With Cirrhosis: A Randomized Trial
Tropical Animal Health and Production Immunomodulating dose of levamisole stimulates innate immune response and prevents intestinal damage in porcine rotavirus diarrhea: a restricted-randomized … Pubmed: 30790158
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