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1988 (1)
1Author    S. Schneider, P. Geiselhart, S. Siebzehnrübl, R. Fischer, H. ScheerRequires cookie*
 Title    Energy Transfer within PC Trimers of Mastigocladus laminosus Studied by Picosecond Time-Resolved Transient Absorption Spectroscopy  
 Abstract    The transient absorption recovery induced in phycocyanin trimers by picosecond pulses of variable wavelength (570—620 nm) has been recorded and analyzed by applying a least-squares multi-exponential fit procedure. The results suggest that in native PC trimers the chromophores exhibit a microheterogeneity with the effect that the derived apparent lifetimes are functions of excitation and probing wave-length. It is suggested that, due to strong excitonic coupling between a-84 and ß-84 chromophores, the lifetime of the terminal acceptor state is reduced to about 900 ps; the apparent energy transfer time from chromophore ß-155 to a-84 and ß-84 chromophores varies between 20—50 ps depending on the actual chromophore-protein arrangement (microheterogeneity). 
  Reference    Z. Naturforsch. 43c, 55—62 (1988); received July 2/October 12 1987 
  Published    1988 
  Keywords    Energy Transfer, Phycocyanin Trimer, Excited State Lifetimes, Transient Absorption Recovery 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0055.pdf 
 Identifier    ZNC-1988-43c-0055 
 Volume    43