Brown adipose tissue mitochondria are cytochrome c-subsaturated
- PMID: 1656204
- DOI: 10.1007/BF00227751
Brown adipose tissue mitochondria are cytochrome c-subsaturated
Abstract
The oxidative activity of mitochondria freshly isolated from brown adipose tissue of rats was stimulated two-fold on the addition of small concentrations of exogenous cytochrome c to the reaction medium. Loss of membrane-bound cytochrome c did not occur during isolation of mitochondria. Estimation of the high-affinity binding sites on the organelle membrane indicated that less than a third of these sites remained saturated with cytochrome c. The pigment is thus shown to be a functionally limiting electron transport component in brown adipose tissue.
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