11.3 + 1.2 arbitrary units (AU) /pg of total RNA (± SE) for weeks 1, 2, 4, and 12, respectively). Similarly, levels of hepatic apo B were unchanged between weeks 1 and 4 (2.5 ± 0.3, 3.1 ± 0.5, 3.5 ± 0.5 AU/10 9 cells (+ SE) for weeks 1, 2, and 4, respectively). However, in week 12, apo B levels were 3.7 times higher (9.4 ± 2.4 AU / 10 g cells, ± SE, p < 0.01 ) than in weeks 1-4. These results indicate no changes in the level of hepatic apo B gene expression during the first 4 weeks of lactation

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... although lipid infiltration increases by 85% during this period. However, the dramatic accumulation of hepatic apo B recorded in week 12, which occurred without changes in levels of mRNA, may have resulted from either a