Abstract
Both the chloroplast fragments and whole chloroplasts fractions had the activities of photosynthetic phosphorylation. The activities of the two fractions were almost equal when calculated on unit amount of chlorophyll. Neither removal of oxygen nor addition of menadione did not produce any accelerating effect on the reaction. From the effect of DNP, it was concluded that the photophosphorylation was a distinct phosphorylation reaction different from oxidative phosphorylation of mitochondria.
The author wishes to express his gratitude to Prof. S. Funahashi of the Faculty of Agriculture, University of Tokyo, for his interest in this work.
