NFKB1 and ulcer disease: The colons submitted to TNBS and treated with (-)-fenchone showed a focal and concentrated presence of NF-κB (brown color positivity) in the distal enterocytes close to the lumen of the organ, next to the goblet cells, which significantly reduced immunostaining to 18.0 (10.0–25.0) μm2 when compared to the colitic group (24.5 (20.0–29.0) μm2), in which the presence of NF-κB is irregular and multifocally marked, especially in the ulcer area (Figure 5).