(b) Immunoblot analysis of phagosome isolates from RAW264.7 macrophages transiently transfected with cDNA encoding Myc-tagged SLAM (Slamf1-Myc) or mock transfected and allowed to phagocytose beads coated with E. coli outer membrane extract for 60 or 120 min. kDa, kilodaltons. Data are representative of at least three independent experiments. 