Figure 3.

Protein content, cytochrome c oxidase activity, and HSD activity in total homogenates, and in mitochondrial and microsomal fractions from trophoblasts of C31 mice that were pregnant for 10 days, 15 days, and 20 days. Each experimental group in the 10 day and 20 day pregnant animals consisted of 6 mice. N = 12 for the 15 day pregnant group. Mitochondrial and microsomal fractions were isolated by differential centrifugation. Results are expressed per individual trophoblast. N.D. = Not detected.