Mitochondrial and peroxisomal oxidation rates of oleate. Oxidation rates were measured in freshly excised samples of semimembranosus proprius and longissimus muscles, using [1-14C]oleate as substrate in the presence (peroxisomal oxidation) or absence (total oxidation) of mitochondrial inhibitors. Mitochondrial oxidation rates were calculated by difference between total and peroxisomal oxidation rates. Values shown are mean ± SEM of oleate oxidation (nmole/min-1 per g of muscle wet weight). The * indicates a significant difference (P < 0.05) in mitochondrial oxidation rate in hLPL rabbits in comparison with their wild-type (WT) littermates.