Abstract

NADPH-dependent lipid peroxidation occurs in rat lung microsomes in vitro. Expressed per wet weight of tissue we found that lung had only 1 100 the activity of liver. However, examination of the rate of malonyl dialdehyde production with different concentrations of NADPH revealed that the kinetics of lipid peroxidation in lung microsomes was indistinguishable from that of NADPH-dependent lipid peroxidation in liver microsomes. With lung microsomes supplemented with NADPH, lipid peroxidation was potentiated by CCl 4 and inhibited by EDTA, Mn 2+, and cytochrome c.

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