Figure 7 Immunohistochemical staining for Reg‐Iα in the stomach of Aα0/0 mice at one (A), two (B), five (C), and six (D) months old. Reg‐Iα positive cells increased in a time dependent manner in the basal gland of the oxyntic mucosa. At one month (A), there were a few Reg‐Iα highly positive wedge shaped cells, which are thought to be enterochromaffin‐like cells, in the visual field. At six months (D), however, there were many Reg‐Iα highly positive cells. Reg‐Iα weakly positive cells in the basal gland of the oxyntic mucosa are thought to be chief cells. Original magnification: A–D ×200.