Mitochondrial protein expression is higher in female than male cerebral arteries. Representative Western blots and summary data: 32-kDa VDAC (A), 36-kDa Complex I (B), 70-kDa Complex II (C), 53-kDa Complex III (D), 57-kDa Complex IV (E), and 50-kDa Complex V (F). Histograms showing increased protein levels in female arteries compared with male. Data are expressed as means ± SE. *P < 0.05 (female vs. male, n = 10–14 samples in each group).