Distribution and ultrastructure of DCAMKL1-expressing cells in normal rat stomach. (A) A light micrograph, showing location of DCAMKL1 cells in the fundic mucosa. Scale: 100 μm. The inset shows a magnified view of the outlined area in A. Scale: 10 μm. (B) Transmission electron micrographs. (a, c) Ultrathin sections without counterstaining. (b, d) Ultrathin sections with counterstaining. (a) DCAMKL1 cells in the fundic gland. Scale: 2 μm, magnification ×5600. (b) The DCAMKL1 cell (D) was smaller than the parietal cell (P), which was rich in mitochondria, and lacked the secretory granules seen in the endocrine cell (E). Scale: 2 μm, magnification ×7000. (c) DCAMKL1 staining was predominantly cytoplasmic. Scale: 1 μm, magnification ×14400. (d) Arrowheads indicate desmosomes. The white arrow shows DCAMKL1 immunoreactivity. Scale: 2 μm, magnification ×8400.