407 research outputs found
Fluorescence kinetics of c-phycocyanin from Mastigoclaudus Laminosus depending on its state of aggregation
UV-VIS absorption spectra at high pressure of C-phycocyanin and allophycocyanin from Mastigocladus laminosus
Energy transfer within phycocyanin trimers of Mastigocladus laminosus studied by picosecond time-resolved transient absorption spectroscopy
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 wavelength.
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 β-155 to a-84 and ß-84 chromophores varies between
20—50 ps depending on the actual chromophore-protein arrangement (microheterogeneity)
Effect of protein environment and the excitonic coupling on the excited-state properties of the bilinchromophores in C-Phycocyanin
STUDIES ON PLANT BILE PIGMENTS.
The (4 Z, 10 2, 15Ej-2,3-dihydrobilindione 4, along with the fully unsaturated (E, 2, Z)-analogue
8, has been prepared from the corresponding (Z, Z, Z)-isomer by a variation of Falk's method
(Falk et ul., 1980). The photochemical and acid-catalyzed back-reactions have been studied by UV-vis
and 'H-NMR spectroscopy
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