Immunogen sequence: YWKEIVHKTN EIMLVLSSFN SCLDPVMYFL MSSNIRKIMC QLLFRRFQGE PSRSESTSEF KPGYSLHDTS VAVKIQSSSK ST. G protein-coupled receptors (GPCRs), such as GPR34, are integral membrane proteins containing 7 putative transmembrane domains (TMs). These pr