sequential tissue washes in dithiothreitol , edta , and collagenase removed the dome epithelium , without disrupting the follicles or villi , and provided a cell suspension containing 74 +/- 6 % lymphocytes , 9 +/- 4 % columnar epithelial cells , 10 +/- 7 % tangible-body macrophages , and 4 +/- 2 % m cells ( follicle-associated epithelial cells ) .
C0014609
epithelium
C0225338
columnar epithelial cells