Immunogen sequence: SPDLPEQWQL WPPVPSGCAS LSSQHSYFDT ESSSSDEFFC RCHRPYCEIC FQSSSDSSDS GTSDTDPEPT GGLASWEKLW ARSKPIVNFK DDLKPTLV Highest antigen sequence identity to the following orthologs: Mouse - 73%, Rat - 74%. G protein-coupled receptors (GPCRs) are