Figure 8: Photomicrographs of sections in the colon showing (a) control group with large number of densely PCNA stained nuclei (arrows) throughout the mucosa. (b) Acetic acid colitis group with weakly stained few PCNA cells in the basal cells of intestinal crypts (arrows). (c) NAC treated group with densely stained PCNA cells within the basal and mid-regions of intestinal crypts (arrows) and in fibrous tissue within the lamina propria (arrow heads). (d) Ginger treated group with large number of PCNA stained cells in all parts of intestinal mucosal crypts from the basal up to intestinal surface on the top (arrows). (e) NAC and ginger treated group with the largest distribution of positive cells (arrows). (PCNA immunostaining, 400X) .