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Chemokines are a family of small signaling proteins that mediate chemotaxis . They are all approximately 8-10Kda in mass and have four cysteine residues in conserved locations that are key to forming their 3-dimensional shape. Chemokines have been classified into four main subfamilies: CXC, CC, CX3C and XC. All of these proteins exert their biological effects by interacting with G protein-linked transmembrane chemokine receptors on the surfaces of their target cells. QED Bioscience’s recombinant chemokines and biotinylated chemokines are available in a range of sizes from 2ug to 1000ug to best suit your research needs.