G protein-coupled receptors (GPCRs) play an integral role in transmitting cellular growth and migration signals in a variety of biological contexts. Alterations in GPCR signaling are associated with immune dysregulation and cancer progression, making GPCRs attractive drug targets. However, the complex biochemical structure and shared homology among family members has made targeting GPCRs difficult. Biocytogen has engineered several strains of humanized GPCR mice to test human GPCR drug candidates. Use of our humanized GPCR models allows for comprehensive safety, dosing, and efficacy testing of your therapeutic candidates prior to clinical development.