CS (A) and porin (B) protein densities in BCAEC following exposure for 48 h to either vehicle (control), 1 nmol/L Ethyl EPI, or 300 μmol/L L-NAME + 1 nmol/L Ethyl EPI. BCAEC; Bovine coronary artery endothelial cells, CS; citrate synthase activity, Ethyl EPI; 3′-O-ethyl epicatechin, L-NAME; L-NG-Nitroarginine methyl ester. Values were normalized by arbitrarily setting the densitometry of control levels to 100. Values are mean ± SEM; n=3 per treatment. *p<0.05 vs. control, ψp<0.05 Ethyl-EPI vs. Ethyl-EPI + L-NAME.