R&D Systems now offers a Quantikine Human CX3CL1/Fractalkine ELISA Kit (Catalog # DCX310 ). CX3CL1/Fractalkine, also known as Neurotactin, is the only member of the CX3C chemokine subfamily. It is expressed on endothelial cells and has been found to trigger the adhesion of T cells and monocytes. This ELISA kit employs the quantitative sandwich enzyme immunoassay technique and is validated for use with cell culture supernates, serum, plasma, saliva, urine, and human milk. Quantikine Kits are fully validated, produce a high signal to noise ratio, and allow for excellent reproducibility.