[Manganese content in chlorophyll-protein complexes of higher plants]

The incorporation of manganese in pigment-protein lamellae complexes was studied. Manganese content was estimated by radioisotopic technique after the precipitation by ammonium sulfate, gel filtration, and polyacrylamide gel electrophoresis of isolated complexes. None of isolated complexes showed manganese content more than 10(-10) g/mg of protein. Possible reason of such a low manganese binding in pigment-protein complexes is discussed.