Figure 7. Scanning electron microscopy (SEM) surface views on apical microvilli of 18-day-old polarized CaCo2 wildtype (WT) cells versus knockout (KO) cells.

(A) CaCo2 WT cells with dense, quite uniform brush-border. (B–H) Patchy distribution of partly abnormal microvilli characterize the apical surface of all KO cell lines specified here. (A–H) Scale = 2 µm.