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Regulation of cellular Mg 2+ by S. cervisiae was investigated. The minimal concentration of Mg 2+ that results in optimal growth of S. cerevisiae is about 30 μM and a half-maximum growth rate is attained at about 5 μM Mg 2+ . Since the plasma membrane has an electrical potential greater than 100 mV, passive equ ilibration of Mg 2+ across the plasma...
The effects of extracellular Ca 2+ on cytotoxicity induced by cardiotoxin (CTX), isolated from Chinese cobra venom, were investigated in cultured rabbit aortic endothelial cells (RAECs). In Hank's buffered saline solution (HBSS) containing 1.2 mM Ca 2+ , CTX (1-30 μM) caused cell necrosis and cell death in a concentration-dependent manner, as determined by trypan blue exclusion...
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