3JZA TRANSPORT PROTEIN, RABGDI, RABGEF, GDI, GEF, GDF, GDI DISPLACEMENT FACTOR, ACETYLATION, CYTOPLASM, GTP-BINDING, LIPOPROTEIN, MEMBRANE, NUCLEOTIDE-BINDING, PRENYLATION, PROTEIN TRANSPORT CRYSTAL STRUCTURE OF HUMAN RAB1B IN COMPLEX WITH THE GEF DOMAIN OF DRRA/SIDM FROM LEGIONELLA PNEUMOPHILA