Data di Pubblicazione:
2005
Citazione:
The low energy emitting states of the Lhca4 subunit of higher plant photosystem I / G. Zucchelli, T. Morosinotto, F.M. Garlaschi, R. Bassi, R.C. Jennings. - In: FEBS LETTERS. - ISSN 0014-5793. - 579:10(2005), pp. 2071-2076.
Abstract:
The selectively red excited emission spectrum, at room temperature, of the in vitro reconstituted Lhca4, has a pronounced non-equilibrium distribution, leading to enhanced emission from the directly excited low-energy pigments. Two different emitting forms (or states), with maximal emission at 713 and 735 nm (F713 and F735) and unusual spectral properties, have been identified. Both high-energy states are populated when selective excitation is into the F735 state and the fluorescence anisotropy spectrum attains the value of 0.3 in the wavelength region where both emission states are present. This indicates that the two states are on the same Lhca4 complex and have transition dipoles with similar orientation.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Anisotropy spectrum, Dipole orientation, Fluorescence bandshape, Lhca4, Low energy chlorophyll forms
Elenco autori:
G. Zucchelli, T. Morosinotto, F.M. Garlaschi, R. Bassi, R.C. Jennings
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