The synthesis of ATP in light by chloroplasts (photophosphorylation)
was discovered by Daniel Arnon,
Mary Belle Allen and F.R. Whatley in 1954. In
the same year, Albert Frenkel observed photophosphorylation
by intracytoplasmic membranes of photosynthetic
bacteria. André Jagendorf summarizes, in
this issue, the history of research on the mechanism of
photophosphorylation.