DORMANCY OF BACTERIAL ENDOSPORE 



83 



TABLE I 



A COMPARISON OF ELECTRON TRANSPORT ENZYMES IN B. CereilS CELLS AND 



SPORES 



Enzyme 



Source 



Particulate DPNH oxidase 



Soluble DPNH oxidase 



DPNH cytochrome c reductase 



Diaphorase 



Succinic cytochrome c reductase** 



* //Moles of DPNH oxidized/h/mg of protein. 

 ** /< Moles of succinate oxidized/h/mg of protein. 



Spores on the other hand have Uttle particulate activity but 

 have a higher content of soluble DPNH oxidase. These findings 

 as well as the cyanide-sensitive and cytochrome assays suggest 

 the following electron transport systems of the two organisms 

 (Fig. 5). 



DPNH- 



Pathways of electron transport 



Flavin — ^02 



Soluble 



Flavin — •-Cyt b — ^Cyt c, — ►Cyt c — ^Cyt a — ».02 



Particulate 

 Flavin 



Succinic acid 



Fig. 5. The soluble and particulate electron transport system of spores and 



vegetative cells. 



References p. 94 



