COMPARISON OF ELECTRON TRANSPORT SYSTEMS IN VEGETATIVE CELLS AND SPORES OF BACILLUS CEREUS

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Abstract
Bacillus cereus strain T vegetative cells contain electron transport particles which have cytochrome absorption peaks at 600, 556, 550, 510 - 530, 440, and 426 m[mu], but cytochrome pigments were not evident in spore particles. Although the main pathway of electron transport in vegetative cells is through the cytochrome-rich particles, the main system in the spore is through a soluble flavoprotein oxidase. The total and specific activities of the soluble oxidase exceed the activities of the incomplete particles of spores. The purification and properties of the reduced diphosphopyridine nucleotide cytochrome c reductase and diaphorase of vegetative cells are presented. The significance of these enzyme systems is discussed.