. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "rpgf4_mouse"^^ . "Epac2"^^ . "cAMP-regulated guanine nucleotide exchange factor II"^^ . "Exchange factor directly activated by cAMP 2"^^ . "Exchange protein directly activated by cAMP 2"^^ . "cAMP-dependent Rap1 guanine-nucleotide exchange factor"^^ . "Rapgef4"^^ . "Cgef2"^^ . . . . . . . "Rap guanine nucleotide exchange factor 4"^^ .