Human FABP2/I-FABP Quantikine ELISA Kit

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Human FABP2/I-FABP ELISA Linearity
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Reviews (3)

Human FABP2/I-FABP Quantikine ELISA Kit Summary

Assay Length
4.5 hours
Sample Type & Volume Required Per Well
Cell Culture Supernates (50 uL), Cell Lysates (50 uL), Serum (10 uL), EDTA Plasma (10 uL), Heparin Plasma (10 uL), Urine (50 uL)
6.21 pg/mL
Assay Range
15.6 - 1,000 pg/mL (Cell Culture Supernates, Cell Lysates, Serum, EDTA Plasma, Heparin Plasma, Urine)
Natural and recombinant human FABP2
< 0.5% cross-reactivity observed with available related molecules.< 50% cross-species reactivity observed with species tested.
No significant interference observed with available related molecules.

Product Summary

The Quantikine Human FABP2/I-FABP Immunoassay is a 4.5 hour solid phase ELISA designed to measure FABP2 levels in cell culture supernates, cell lysates, serum, plasma, and urine. It contains E. coli-expressed recombinant human FABP2 and antibodies raised against the recombinant protein. Results obtained for naturally occurring human FABP2 showed linear curves that were parallel to the standard curves obtained using the Quantikine Human FABP2 Immunoassay standards. These results indicate that this kit can be used to determine relative mass values for natural human FABP2.


Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision
Inter-Assay Precision (Precision between assays) Three samples of known concentration were tested in twenty separate assays to assess inter-assay precision. Assays were performed by at least three technicians using two lots of components

Cell Culture Supernates, Cell Lysates, Serum, EDTA Plasma, Heparin Plasma, Urine

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean 77.5 207 425 80.5 216 446
Standard Deviation 3.14 7.24 12.4 8.94 17.4 26.6
CV% 4.1 3.5 2.9 11.1 8.1 6


The recovery of human FABP2 spiked to levels throughout the range of the assay in various matrices was evaluated.

Sample Type Average % Recovery Range %
Cell Culture Media (n=4) 100 96-104
Cell Lysis Buffer (n=2) 83 81-85
EDTA Plasma (n=4) 97 85-102
Heparin Plasma (n=4) 95 96-104
Serum (n=4) 101 97-106
Urine (n=4) 90 85-95


To assess the linearity of the assay, samples containing and/or spiked with high concentrations of human FABP2 were diluted with Calibrator Diluent to produce samples with values within the dynamic range of the assay.
Human FABP2/I-FABP ELISA Linearity

Product Datasheets

Preparation and Storage

The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: FABP2/I-FABP

Fatty acid binding proteins are small cytoplasmic lipid binding proteins that are expressed in a tissue specific manner. FABPs bind free fatty acids, cholesterol, and retinoids, and are involved in intracellular lipid transport. Circulating FABP levels are used as indicators of tissue damage. Some FABP polymorphisms have been associated with disorders of lipid metabolism and the development of atherosclerosis.

FABP2, also known as intestinal fatty acid binding protein (I-FABP or FABPI) and gut FABP (gFABP), is a member of the cytosolic fatty acid binding protein family. FABP2 mediates the absorption and intracellular transport of dietary long-chain fatty acids. Genetic variations of FABP2 are implicated in obesity and Type II diabetes. Human FABP2 shares 78%, 82%, and 86% amino acid sequence identity with mouse, rat, and canine FABP2, respectively.

Long Name:
Fatty Acid-Binding Protein 2/Intestinal FABP
Entrez Gene IDs:
2169 (Human); 25598 (Rat)
Alternate Names:
FABP2; FABPI; fatty acid binding protein 2, intestinal; Fatty acid-binding protein 2; fatty acid-binding protein, intestinal; IFABP; I-FABP; I-FABPMGC133132; Intestinal FABP; Intestinal-type fatty acid-binding protein
⚠ WARNING: This product can expose you to chemicals including N,N-Dimethylforamide, which is known to the State of California to cause cancer. For more information, go to

Citations for Human FABP2/I-FABP Quantikine ELISA Kit

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

5 Citations: Showing 1 - 5
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  1. Long-lasting severe immune dysfunction in Ebola virus disease survivors
    Authors: A Wiedemann, E Foucat, H Hocini, C Lefebvre, BP Hejblum, M Durand, M Krüger, AK Keita, A Ayouba, S Mély, JC Fernandez, A Touré, S Fourati, C Lévy-March, H Raoul, E Delaporte, L Koivogui, R Thiébaut, C Lacabaratz, Y Lévy,
    Nat Commun, 2020;11(1):3730.
    Species: Human
    Sample Types: Serum
  2. Sialylation and fucosylation modulate inflammasome-activating eIF2 Signaling and microbial translocation during HIV infection
    Authors: LB Giron, CE Tanes, MH Schleimann, PA Engen, LM Mattei, A Anzurez, M Damra, H Zhang, K Bittinger, F Bushman, A Kossenkov, PW Denton, H Tateno, A Keshavarzi, AL Landay, M Abdel-Mohs
    Mucosal Immunol, 2020;0(0):.
    Species: Human
    Sample Types:
  3. Gut permeability, inflammation, and bone density across the menopause transition
    Authors: A Shieh, M Epeldegui, AS Karlamangl, GA Greendale
    JCI Insight, 2019;0(0):.
    Species: Human
    Sample Types: Plasma
  4. Hypoallergenic and anti-inflammatory feeds in children with complicated severe acute malnutrition: an open randomised controlled 3-arm intervention trial in Malawi
    Authors: RH Bartels, E Chimwezi, V Watson, L Pei, I Potani, B Allubha, K Chidzalo, D Wang, Q Dube, M Mallewa, A Allen, RHJ Bandsma, WP Voskuijl, SJ Allen
    Sci Rep, 2019;9(1):2304.
    Species: Human
    Sample Types: Plasma
  5. Relation between postoperative ileus and anastomotic leakage after colorectal resection: a post hoc analysis of a prospective randomized controlled trial
    Authors: E G Peters
    Colorectal Dis, 2016;0(0):.
    Species: Human
    Sample Types: Plasma


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Reviews for Human FABP2/I-FABP Quantikine ELISA Kit

Average Rating: 4.7 (Based on 3 Reviews)

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Human FABP2/I-FABP Quantikine ELISA Kit
By Anonymous on 10/20/2017
Application: Sample Tested: blood and respiratory

Human FABP2/I-FABP Quantikine ELISA Kit
By Anonymous on 09/07/2017
Application: Sample Tested: Serum

The Quantikine ELISA kit worked as expected with low % CV's, and reproducible results.

Human FABP2/I-FABP Quantikine ELISA Kit
By Anonymous on 02/08/2017
Application: Sample Tested: human plasma