Natural and recombinant mouse Fractalkine (chemokine and extracellular domains)
Cross-reactivity observed with 1 or more available related molecules.< 50% cross-species reactivity observed with species tested.
No significant interference observed with available related molecules.
The Quantikine Mouse Fractalkine Immunoassay is a 4.5 hour solid-phase ELISA designed to measure mouse Fractalkine in cell culture supernates, tissue homogenates, mouse serum, and plasma. It contains E. coli-expressed recombinant mouse Fractalkine chemokine domain and antibodies raised against the recombinant protein. Results obtained for naturally occurring soluble mouse Fractalkine containing the chemokine domain and the mucin stalk domain showed linear curves that were parallel to the standard curves obtained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for natural mouse Fractalkine.
Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested on one plate to assess intra-assay precision.
Inter-Assay Precision (Precision between assays) Three samples of known concentration were tested in separate assays to assess inter-assay precision.
The recovery of mouse Fractalkine spiked to levels throughout the range of the assay in various matrices was evaluated.
Average % Recovery
Cell Culture Supernates (n=5)
EDTA Plasma (n=6)
Heparin Plasma (n=6)
Tissue Homogenates (n=1)
To assess the linearity of the assay, samples containing or spiked with high concentrations of mouse Fractalkine in each matrix were diluted with Calibrator Diluent and assayed.
Preparation and Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.
CX3CL1/Fractalkine is a transmembrane adhesion protein with a chemokine domain separated from the membrane by a mucin stalk. It is upregulated on many cell types during inflammation. The chemokine and mucin regions can be shed as a soluble chemokine that signals through the receptor CX3CR1. During extravasation, membrane-bound CX3CL1 traps leukocytes, then is cleaved to allow diapedesis. Soluble CX3CL1 protects neurons from microglial neurotoxicity, recruits macrophages for wound healing, recruits osteoclast precursors for bone resorption, and contributes to pathogenesis in coronary artery disease.
Entrez Gene IDs
6376 (Human); 20312 (Mouse); 89808 (Rat);
ABCD-3; C3Xkine; chemokine (C-X3-C motif) ligand 1; CX3C membrane-anchored chemokine; CXC3; CXC3C; FKN; Fractalkine; Neurotactin; neurotactin); NTNsmall inducible cytokine subfamily D (Cys-X3-Cys), member 1 (fractalkine; NTTSmall-inducible cytokine D1; SCYD1C-X3-C motif chemokine 1; small inducible cytokine subfamily D (Cys-X3-Cys), member-1;
Refer to the product for complete assay procedure.
Bring all reagents and samples to room temperature before use. It is recommended that all samples, standards, and controls be assayed in duplicate.
Prepare all reagents, standard dilutions, and samples as directed in the product insert.
Remove excess microplate strips from the plate frame, return them to the foil pouch containing the desiccant pack, and reseal.
50 µL Assay Diluent
Add 50 µL of Assay Diluent to each well.
50 µL Standard, Control, or Sample
Add 50 µL of Standard, Control, or sample to each well. Cover with a plate sealer, and incubate at room temperature for 2 hours.
Aspirate each well and wash, repeating the process 4 times for a total of 5 washes.
100 µL Conjugate
Add 100 µL of Conjugate to each well. Cover with a new plate sealer, and incubate at room temperature for 2 hours.
Aspirate and wash 5 times.
100 µL Substrate Solution
Add 100 µL Substrate Solution to each well. Incubate at room temperature for 30 minutes. PROTECT FROM LIGHT.
100 µL Stop Solution
Add 100 µL of Stop Solution to each well. Read at 450 nm within 30 minutes. Set wavelength correction to 540 nm or 570 nm.
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