Hepatic (panel A) and intestinal (panel B) microsomal triglyceride transfer protein (MTTP) activity. The F1B (solid) and Golden Syrian (shaded) hamsters were fed fish oil (FO), monounsaturated fatty acid rich (MUFA) or N6:N3 diets. Animals were fed the specified diets for four weeks. Upon sacrifice, the liver and intestine were removed and snap frozen in liquid nitrogen and stored at -70°. Tissues were then analyzed for MTTP activity as described in the materials and methods section. Means for a variable with a different letter are significantly different (p < 0.05) by two-way ANOVA and the Newman-Keuls post-hoc test.