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Expression of lipoprotein receptors in extraembryonic fetal tissues in the hamster. Tissues were collected from dams treated as in Fig. 1. Tissues were pooled (n = 3–4) and the relative amount of the LDLR in the placenta (A) and SR-BI in the yolk sac (B) were determined by immunoblotting; 150 μg protein was loaded in each lane, and β-Actin was used as a control for loading.
