Photosynthetic Phosphorylation in the Presence of Spinach Phosphodoxin.

The isolation and purification of a new substance named phosphodoxin from photosynthetic organisms was described recently (7, 8). Phosphodoxin is a naturally occurring thermostable, water-soluble compound(s) which catalyzes photophosphorylation with both chloroplasts and chromatophores in the absence of exogenous electron acceptors. This report will present further properties of spinach phosphodoxin and the effects of spinach phosphodoxin on some photochemical reactions catalyzed by spinach chloroplast fragments.

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