Chemokine (C-X-C motif) receptor 1 (CXCR1) is a rhodopsin-like G protein-coupled receptor. It is one of two high-affinity receptors for the CXC chemokine interleukin-8 (IL-8), a major mediator of immune and inflammatory responses. The structure of human CXCR1 in a lipid bilayer should help to facilitate the discovery of new compounds that interact with GPCRs. GenScript’s human CXCR1-expressing stable subline is guaranteed to function properly in the calcium flux assay.