Expression of α-syn in the small intestine of transgenic mice with age. Representative images of α-syn-GFP expression in the small intestine proximal to the stomach (left), the middle of the small intestine (middle), and the distal intestine (right) at 3, 6, 9, 18, and 24 months (m). Arrows, high-power images in insets; scale bar 250 μm.