Cyanide electron transport chain -

cyanide electron transport chain

Although sulfide is a respiratory poison, it is also a potent reductant.

Animal Physiology

Geukensia demissa gill mitochondria can use sulfide as a respiratory substrate for ATP production, and the gills of this species exhibit sulfide-supported oxygen consumption that matches the energy demand of ciliary beating. Here, we demonstrate i that the major product of G. A value for this ratio of unity is consistent with electrons from sulfide oxidation entering the mitochondrial electron transport chain. In the gills of the blue mussel Mytilus edulis from sulfide-free conditions, this ratio is 3—5 times higher, indicating an uncoupling of oxygen consumption from sulfide oxidation.

cyanide electron transport chain

Whereas M. Keywords: sulphidegillssulphide oxidationbromobimane HPLCsuccinatemusselGeukensia demissaMytilus edulis. Introduction The ribbed mussel Geukensia demissa inhabits sulfide-rich coastal sediments Lee et al.

cyanide electron transport chain

Sulfide is a potent reductant and source of energy that is exploited by sulfide-oxidizing bacteria. Mitochondria isolated from the gills of G. This sulfide-supported chemolithoheterotrophic production of ATP matches the energy demand of ciliary beating Doeller et al. Thus, despite sulfide toxicity, mitochondrial sulfide oxidation can support cellular work in the gills of G. In the present study, the products of sulfide oxidation in G. The rates of sulfide oxidation and oxygen consumption were measured in the same gill preparation to determine the relationship between sulfide oxidation and Cyanide electron transport chain demand. In addition, the gill contents of succinate were estimated rransport an indication of anaerobic metabolism: when cytochrome c oxidase can no longer transfer electrons to oxygen because see more either limiting ambient oxygen tensions or sulfide inhibition, fumarate is reduced to succinate Grieshaber et al.

What is Cyanide?

Gills from the blue mussel Mytilus edulis, from intertidal low-sulfide habitats, were examined for comparative purposes. Materials and methods Animal collection and maintenance Geukensia demissa Dillwyn were collected from intertidal Spartina sp. Hauschild et al. Animals were partially buried within sulfide-generating cyanife maintained at a depth of 15 cm in the tubs.]

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