(a) Colocalization of SLAM and bacteria in RAW264.7 macrophages transfected with SLAM-mCherry and allowed to phagocytose E. coli-eGFP or S. aureus-eGFP for 0-120 min (time (in min), bottom right corners at left). Original magnification, ×60. Right, quantification of fluorescence at left. Data are representative of two independent experiments with a minimum of 40 bacteria per time point (error bars, s.d.). 