Effects of ischemia/reperfusion on myocardial bmal1 (A), clock (B), and npas2 (C) gene expression. Values are shown as the mean ± SEM for between 5 and 7 observations in each group. Data are normalized to nanograms total RNA. #, p<0.05 and ###, p<0.001 anterior versus posterior (group); &, p<0.05 and &&, p<0.01 anterior versus posterior (group-time interaction).