FAA is present in both the nuclear and the cytoplasmic compartment. (A) (see page 2232) Costaining of FAA and IgG heavy chain-tagged FAC in transiently transfected Hela cells by immunofluorescence. (B) Western blotting on subcellular fractions derived from 293 cells transiently expressing FAA. n, nuclear fraction; c, cytosollic fraction; m, membrane fraction.