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Microsomal triglyceride transfer protein (MTTP) lipid transfer activity after incubation for 24 h with 0.8 mM oleic acid (OA) and with and without 400 ng/ml DOX. Nontransfected IPEC-1 cells were used as a control. Bars represent mean activity expressed as percent lipid transferred per mg protein per hour ± SE from 3 Transwells as described under methods. Statistical significance is indicated by 2-tailed P values.
