Immunohistochemistical analysis of the hippocampus. Higher magnification of the results from the right hemisphere are shown for the control soybean oil diet (A, E, I), cholesterol diet (B, F, J), hydrogenated soybean oil diet (C, G, K), and saturated fat lard diet (D, H, L). Panels A–D reveal H + E staining. Antibodies used include MAP2 (E-H) and 5-LOX (I-L). Arrows mark regions of loss or lowered expression. Magnification = 20 × , scale bar = 100 μm.