The Reduction of Protochlorophyllide into Chlorophyllide V. Demonstration of Energy Transfer inside the P688-676 Molecular Units

From measurements of low-temperature emission, absorption and action spectra of fluorescence of partly phototransformed bean leaves, evidences for in vivo energy transfer from protochlorophyllide to chlorophyllide are given. The number of pigment molecules per transfer unit is shown to be much greater in vivo than in vitro.