“…In contrast to light induced phosphorylation; there is no need for electron transport; light and addition of the electron carrier PMS do not enhance the formation of ATP under the described conditions. Furthermore the building up of a high energy membrane state, either by light or by an acid base transition as found necessary for the ATP/Pi exchange [7,9] and for the ATPase [ 12, 181, is no prerequisite for an ATP synthesis from ADP and pyrophosphate. A thiol reagent, activating ATP/Pi exchange and ATP hydrolysis, has no remarkable effect on the ATP synthesis with pyrophosphate.…”