ENERGY TRANSFER IN GREEN BACTERIA 



417 



+ .004 - 



+.002 - 



< 

 < 



.002 



-.004 



+ .001 



< 

 < 



.001 



-.002 



400 450 500 



WAVELENGTH IN m^Li 



550 



Fig. 4. Light-induced absorbancy changes in anaerobic green bacteria. 

 Upper panel: changes in C. fliiosnlfatophil/iiii L caused by 0.80 ^ light 

 of "high" intensity (? x 10-9 einstein cm-2 sec-l). Lower panel: 

 changes in Cps. cthylicuni caused by 0.80 yU light of "low" intensity 

 (l X 10-9 einstein cm-2 sec-l). 



