Figure 2 .

(A) Immunofluorescence for DAF (CD55) in sections of ethanol fixed specimen from the gastric antrum of a patient with H pylori infection, gastric ulcer, and extensive metaplasia. (B) Adjacent haematoxylin and eosin stained section shown for morphological orientation. The foveolar pit on the left shows intestinal metaplasia, with apical CD55 expression on enterocytes, whereas goblet cells (arrow) are negative, producing a gap in the fluorescent luminal brim. Gastric pit epithelium elsewhere in the section is completely CD55-negative. Original magnifications: A and B, × 400.