• PN: A112221


45x Ab-conjugated beads (S4P2 - human fractalkine Ab-bead). PN: A112221A. One vial containing 100 µL of anti-human fractalkine conjugated to AimPlex Bead S4P2.

25x Biotin-detection Ab (human Fractalkine Biotin-dAb). PN: A112221B. One vial containing 100 µL of biotinylated anti-human fractalkine.

Lyophilized Standard Mix-Human Group 3 Panel A, 8-Plex. PN: HG30008. One vial containing lyophilized recombinant human Fractalkine, LIF, TNFβ, VEGF-D, I-TAC, MIP-1α, MIP-1β, and TIM-1. Note: If multiple analyte kits on the above target list are ordered as a panel, only one vial of standard mix is supplied for those analyte kits.

STORAGE:  2-8 C in the dark.

IMPORTANT: Sodium azide forms explosive compounds with heavy metals. These products contain <0.05% (w/w) azide which with repeated contact with lead and copper commonly found in plumbing drains may result in the buildup of shock sensitive compounds. Dispose in accordance with regulations from your institute.

APPLICATION: Optimal antibody pair and antigen standard for assaying human Fractalkine/CX3CL1.  Can be multiplexed with other analytes in Human Group 3.  To be used in conjunction with the AimPlex NR Basic Kit (PN: P100001) and a diluent kit. Refer to the AimPlex Multiplex Immunoassay User Manual and kit inserts for the assay procedure.

For Research Use Only.  Not for use in diagnostic procedures.

Assay Specifications:

Sample types: Cell culture supernatant, serum, plasma, bodily fluid and tissue/cell lysate

Sensitivity (LOD): < 10 pg/mL

Quantitation range:

LLOQ: < 20 pg/mL

ULOQ: > 5,000 pg/mL

Standard dose recovery: 70-130%

Intra-assay CV: < 10%

Inter-assay CV: < 20%

Cross-reactivity of analytes in Human Group 3: Negligible

Sample volume: 15 µL/test


Fractalkine (or CX3CL1) is a large cytokine protein that contains multiple domains and is the only known member of the CX3C chemokine family. It is also commonly known under the names fractalkine (in humans) and neurotactin (in mice). Soluble CX3CL1 potently chemoattracts T cells and monocytes, while the cell-bound chemokine promotes strong adhesion of leukocytes to activated endothelial cells, where it is primarily expressed. CX3CL1 elicits its adhesive and migratory functions by interacting with the chemokine receptor CX3CR1. Its gene is located on human chromosome 16 along with some CC chemokines known as CCL17 and CCL22.  CX3CL1 is up-regulated in the hippocampus during a brief temporal window following spatial learning, the purpose of which may be to regulate glutamate-mediated neurotransmission tone. This indicates a possible role for the chemokine in the protective plasticity process of synaptic scaling. Diseases associated with CX3CL1 include chorioretinitis and pityriasis rosea.


1.      Pan Y, Lloyd C, Zhou H, Dolich S, Deeds J, Gonzalo JA, Vath J, Gosselin M, Ma J, Dussault B, Woolf E, Alperin G, Culpepper J, Gutierrez-Ramos JC, Gearing D (1997). "Neurotactin, a membrane-anchored chemokine upregulated in brain inflammation". Nature 387 (6633): 611–617. doi:10.1038/42491. PMID 9177350.

2.      Bazan JF, Bacon KB, Hardiman G, Wang W, Soo K, Rossi D, Greaves DR, Zlotnik A, Schall TJ (1997). "A new class of membrane-bound chemokine with a CX3C motif". Nature 385 (6617): 640–644. doi:10.1038/385640a0. PMID 9024663.

3.      Imai T, Hieshima K, Haskell C, Baba M, Nagira M, Nishimura M, Kakizaki M, Takagi S, Nomiyama H, Schall TJ, Yoshie O (1997). "Identification and molecular characterization of fractalkine receptor CX3CR1, which mediates both leukocyte migration and adhesion". Cell 91 (4): 521–530. doi:10.1016/S0092-8674(00)80438-9. PMID 9390561.

4.      Nomiyama H, Imai T, Kusuda J, Miura R, Callen DF, Yoshie O (1998). "Human chemokines fractalkine (SCYD1), MDC (SCYA22) and TARC (SCYA17) are clustered on chromosome 16q13". Cytogenet. Cell Genet 81 (1): 10–11. doi:10.1159/000015000. PMID 9691168.