Immunogen sequence: MDFGSLETVV ANSAFIAARG SFDGSSSQPS RDKKYLAKLK LPPLSKCESL RDSLSLEFES VCLEQPIGKK LFQQFLQSAE KHLPALELWK DIEDYDTADN DLQPQKAQTI LAQYLDPQAK LFCSFLDEGI VAKFKEGPVE IQDGLFQPLL QATLAHLGQA. GRK1 is a member of the guanine nucleotide-binding protei