242 



ELECTRON TRANSPORT 



4. 



e 



<\j 



'^^ ^LIGHT 



H .Ir ON 



>- 

 o 

 ^ 



LIGHT 



CHROMATOPHORES ALONE y ^^^ 



+ NAD . DPIPH; 



< 



03 



CO 

 CD 

 < 



+ FUMARATE , DPIPH2 



2 3 



MINUTES 



Fig. 5. Inability of R. nibru >n chromatophores to photo- 

 oxidize ferrocyanide. The experimental conditions were 

 the same as those given for Fig. 1, except that 1 mM 

 potassium ferrocyanide was substituted forDPIPH2. The 

 BChl concentration was 0.212 mg per 8 ml reaction sys- 

 tem. 



Fig. 6. Photooxidation of DPIPH2 by R. riibrio)! chromatophores 

 under aerobic conditions. The experimental procedures given for 

 Fig. 1 were employed with air present. No oxidant was added. 



