Fig. 3. Effect of Stx1-B subunit on the distribution of CD44 and actin in ACHN cells. ACHN cells were examined as described in Fig. 2 using Alexa-488-labeled anti-CD44 mAb (left panels, green) and TRITC-phalloidin (center panels, red). The arrowheads indicate the areas of CD44 and actin colocalization (yellow). Results are representative of three independent experiments.