J. Kurreck et al., HIGHLY PURIFIED D1 D2/CYT B559 PREPARATIONS FROM SPINACH DO NOT CONTAIN THE NONHEME IRON CENTER/, FEBS letters, 403(3), 1997, pp. 283-286
Fe-57 enriched D1/D2/cyt b559 preparations were isolated from spinach
grown hydroponically on a Fe-57 containing medium. In terms of polypep
tide and pigment composition these samples are of high purity and func
tional integrity of P680. Mossbauer spectra measured in D1/D2/cyt b559
complexes revealed that these preparations are completely deprived of
the non-heme iron center. Possible implications of this finding are d
iscussed for the electron transfer from Pheo(-.) to exogenous electron
accepters. (C) 1997 Federation of European Biochemical Societies.