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Dihydroethidium (DHE) fluorescence in human umbilical vein endothelial cells (HUVEC) whole cells incubated chronically for 7 days with 0 to 500 μM asymmetric dimethylarginine (ADMA), or HUVEC membranes incubated for 30 min with 10 to 500 μM ADMA. * p < 0.05 versus 10 μM ADMA whole cell or cell membrane treatment. n = 6.
