226 



METABOLISM AND PHYSIOLOGY 



TABLE 1 



Activity of chroinatophores and chloroplasts with factor from other organisms. 



Activity is expressed as fimoles of ATP per mg bacteriochlorophyll 



or chlorophyll per hour 



Source of factor 



Rhodospirillum rubnim 

 chromatophores 



Spinach chloroplasts 



120 



.05 .10 .15 



ml of CHROMATIUM Factor 



.20 



Fig. 2. F]ffect of concentration of the factor isolated from Chroindliiiiii 

 on photophosphorylation with spinach chloroplasts. 



