caa a22 4500 465744753 CHVBK 20180323111817.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF01808114 doi (NATIONALLICENCE)springer-10.1007/BF01808114 Protoporphyrin ix as a possible ancient photosensitizer: Spectral and photochemical studies [Elektronische Daten] [G. Lozovaya, Z. Masinovsky, A. Sivash] Due to the potential special position of protoporphyrin IX in the evolution of photosynthesis, the absorption and fluorescence characteristics of this pigment and its complexes with human serum albumin (HSA) and basic proteinoid have been studied in parallel with their photochemical activity. The most significant change in the absorption spectrum of PP IX was the appearance of a new maximum at 455 (or 461) nm in the presence of HSA or proteinoid respectively. Some changes in the physicochemical properties of PP IX in different microenvironments have been detected by changes in fluorescence emission and excitation spectra (intensity, quantum yields, position of maxima). The increase of fluorescence quantum yield resulting from the formation of PP IX complexes with HSA or proteinoid correlates with the increase of their photochemical activity. Results obtained are discussed from the point of view of the early evolution of the photosynthetic apparatus. Kluwer Academic Publishers, 1990 Lozovaya G. N. G. Kholodny Institute of Botany, Ukr. SSR Academy of Sciences, Repin str. 2, Kiev, U.S.S.R. aut Masinovsky Z. Laboratory of Evolutionary Biology, Czechoslovak Academy of Sciences, Na Folimance 11, Prague, Czechoslovakia aut Sivash A. N. G. Kholodny Institute of Botany, Ukr. SSR Academy of Sciences, Repin str. 2, Kiev, U.S.S.R. aut Origins of life and evolution of the biosphere Kluwer Academic Publishers 20/3-4(1990-05-01), 321-330 0169-6149 20:3-4<321 1990 20 11084 https://doi.org/10.1007/BF01808114 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01808114 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lozovaya G. N. G. Kholodny Institute of Botany, Ukr. SSR Academy of Sciences, Repin str. 2, Kiev, U.S.S.R aut NATIONALLICENCE 700 1- Masinovsky Z. Laboratory of Evolutionary Biology, Czechoslovak Academy of Sciences, Na Folimance 11, Prague, Czechoslovakia aut NATIONALLICENCE 700 1- Sivash A. N. G. Kholodny Institute of Botany, Ukr. SSR Academy of Sciences, Repin str. 2, Kiev, U.S.S.R aut NATIONALLICENCE 773 0- Origins of life and evolution of the biosphere Kluwer Academic Publishers 20/3-4(1990-05-01), 321-330 0169-6149 20:3-4<321 1990 20 11084 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465123104 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer