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320-EO) chemoattracts the BaF3 mouse proB cell line transfected with human CCR3 in a dose-dependent manner (orange line). The amount of cells that migrated through to the lower chemotaxis chamber was measured by Resazurin (Catalog # AR002). Chemotaxis elicited by Recombinant CCL11/Eotaxin (0.333 µg/mL) is neutralized (green line) by increasing concentrations of Rat Anti-Human CCR3 Monoclonal Antibody (Catalog # MAB155). The ND50 is typically 0.05-0.25 µg/mL." class="big_lightbox" target="_blank">
CKR3, or C-C chemokine receptor type 3, is a G protein-coupled, seven-transmembrane domain receptor protein. The chemokine eotaxin appears to be a highly specific agonist for CKR3, making CKR3 one of the factors responsible for selective recruitment of eosinophils to sites of inflammation (1). It has been shown that more than one chemokine activates CKR3, including eotaxin, RANTES, and MCP-3 (2). Since CKR3 is prominently expressed in eosinophils , it has been named the human eosinophil eotaxin receptor (2,3).