Human FABP4 (Fatty Acid Binding Protein 4, Adipocyte) ELISA Kit (HUES01520)
- Product Type:
- ELISA Kit
- 96 Assays
- ELISA Type:
- A-FABP, AFABP, AP2, Adipocyte Protein 2
- Tested Sample Types:
- Serum, plasma and other biological fluids
|Detection Range:||0.39-25 ng/mL|
|Sample Volume Required Per Well:||100µL|
|Sample Type:||Serum, plasma and other biological fluids|
|Specificity:||This kit recognizes Human FABP4 in samples. No significant cross-reactivity or interference between Human FABP4 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 Human FABP4. 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 Human FABP4 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 Human FABP4, 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 Human FABP4. The concentration of Human FABP4 in samples can be calculated by comparing the OD of the samples to the standard curve.
|UniProt Protein Function:||FABP4: a lipid transport protein that is the predominant fatty acid binding protein found in adipocytes. Also expressed in macrophages. Binds both long chain fatty acids and retinoic acid. Delivers long-chain fatty acids and retinoic acid to their cognate receptors in the nucleus. Homodimer. Forms a beta-barrel structure that accommodates hydrophobic ligands in its interior. Interacts with PPARG. Monomer. FABP4 knockout mice fed a high-fat and high-calorie diet become obese but develop neither insulin resistance nor diabetes, suggesting that this protein might be a link between obesity and insulin resistance and diabetes. Mice deficient in both FABP4 and ApoE show protection against atherosclerosis when compared with mice deficient only in ApoE. Mice carrying a FABP4 genetic variant exhibit both reduced FABP4 expression and a reduced potential for developing type 2 diabetes and coronary heart disease. A related study in humans indicated a similar pattern, suggesting that FABP4 may be a potential therapeutic target in the treatment of these disorders. Belongs to the calycin superfamily,fatty-acid binding protein (FABP) family.|
|UniProt Protein Details:|
Chromosomal Location of Human Ortholog: 8q21
Cellular Component: cytoplasm; lipid particle; nucleus
Molecular Function:transporter activity; fatty acid binding
Biological Process: cholesterol homeostasis; transport; white fat cell differentiation; triacylglycerol catabolic process; brown fat cell differentiation; negative regulation of protein kinase activity; cytokine production; negative regulation of transcription, DNA-dependent; positive regulation of inflammatory response
|NCBI Summary:||FABP4 encodes the fatty acid binding protein found in adipocytes. Fatty acid binding proteins are a family of small, highly conserved, cytoplasmic proteins that bind long-chain fatty acids and other hydrophobic ligands. It is thought that FABPs roles include fatty acid uptake, transport, and metabolism. [provided by RefSeq, Jul 2008]|
|NCBI GenInfo Identifier:||119781|
|NCBI Gene ID:||2167|
|NCBI Accession:||P15090. 3|
|UniProt Secondary Accession:||P15090,Q6IBA1,|
|UniProt Related Accession:||P15090|
|NCBI Full Name:||Fatty acid-binding protein, adipocyte|
|NCBI Synonym Full Names:||fatty acid binding protein 4, adipocyte|
|NCBI Official Symbol:||FABP4|
|NCBI Official Synonym Symbols:||aP2; ALBP; AFABP; A-FABP; HEL-S-104|
|NCBI Protein Information:||fatty acid-binding protein, adipocyte; fatty acid-binding protein 4; adipocyte lipid-binding protein; epididymis secretory protein Li 104; adipocyte-type fatty acid-binding protein|
|UniProt Protein Name:||Fatty acid-binding protein, adipocyte|
|UniProt Synonym Protein Names:||Adipocyte lipid-binding protein; ALBP; Adipocyte-type fatty acid-binding protein; A-FABP; AFABP; Fatty acid-binding protein 4|
|Protein Family:||Fatty acid-binding protein|
|UniProt Gene Name:||FABP4|
|UniProt Entry Name:||FABP4_HUMAN|
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.
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human FABP4 were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human FABP4 were tested on 3 different plates, 20 replicates in each plate.
|Intra-assay Precision||Inter-assay Precision|
|C V (%)||5.69||4.78||4.01||5.83||4.38||3.55|
The recovery of Human FABP4 spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.
|Sample Type||Range (%)||Average Recovery (%)|
|EDTA plasma (n=5)||92-104||99|
|Cell culture media (n=5)||84-98||90|
Samples were spiked with high concentrations of Human FABP4 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)|
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.
|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 100 µL of standard solutions into the standard wells.
- Add 100 µL of Sample / Standard dilution buffer into the control (zero) well.
- Add 100 µL 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 100 µL 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 350 µL 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 100 µL 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 90 µL 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.