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Nitric oxide synthase (NOS) activity and endothelial NOS (eNOS) content. A: NOS activities. B, top: typical immunoblot of eNOS and actin; bottom: actin-normalized eNOS contents. These variables were measured in myocardium sampled 4 h after CPB with control (hatched bars) or pyruvate-fortified (solid bars) cardioplegia, or at the corresponding sham time point (open bars). Values are means ± SE; n = 8 experiments/group. *P < 0.01 vs. sham; †P < 0.01 vs. control.
