Results 191 to 200 of about 158,403 (236)
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Plant and Cell Physiology, 1987
Chlorophyll-protein complexes associated with photosystem I were isolated from native photosystem I particles (PS 1-200) of spinach thylakoids by centrifugation in SDS-sucrose density gradients. These complexes were designated CPIa (Chl/P700 ratio of =160), CPI' (CW/P700 ratio of =70), and LHCI (light-harvesting Chi a/bprotein complex associated with ...
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Chlorophyll-protein complexes associated with photosystem I were isolated from native photosystem I particles (PS 1-200) of spinach thylakoids by centrifugation in SDS-sucrose density gradients. These complexes were designated CPIa (Chl/P700 ratio of =160), CPI' (CW/P700 ratio of =70), and LHCI (light-harvesting Chi a/bprotein complex associated with ...
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Difference picosecond spectroscopy of pigment-protein complexes of photosystem I from higher plants
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1984Using a difference picosecond spectrophotometer with a time resolution of 10 ps, we investigated excitation energy transfer and charge separation in pigment-protein complexes of Photosystem I from bean leaves (chlorophyllP-700 = 60). Under 20 ps excitation at 650 or 667 nm, the difference absorption spectra in the spectral region 600–720 nm were ...
Marina D. Il'ina +3 more
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1987
Higher plants’ photosystem I (PSI) contains two chlorophyll-protein complexes: a core complex (CCI) and an antenna complex (LHCI) (1). While only light harvesting occurs in the LHCI complex, primary photochemistry as well as some light harvesting take place in CCI, which contains the reaction center (P700).
Rachel Nechushtai +2 more
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Higher plants’ photosystem I (PSI) contains two chlorophyll-protein complexes: a core complex (CCI) and an antenna complex (LHCI) (1). While only light harvesting occurs in the LHCI complex, primary photochemistry as well as some light harvesting take place in CCI, which contains the reaction center (P700).
Rachel Nechushtai +2 more
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Structure and function of wild-type and subunit-depleted photosystem I in Synechocystis.
Biochimica et Biophysica Acta - Bioenergetics, 2018The ability of photosynthetic organisms to use the sun's light as a sole source of energy sustains life on our planet. Photosystems I (PSI) and II (PSII) are large, multi-subunit, pigment-protein complexes that enable photosynthesis, but this intriguing ...
T. Malavath +4 more
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[Study of electron transfer in pigment-protein complexes of photosystem I].
Molekuliarnaia biologiia, 1979The electron transfer processes occuring in SDS chlorophyll--protein complexes of photosystem I were studied by flash photolysis. Transient species with lifetime about 5.10(-5) sec were found to be produced on flash excitation of complex buffer solutions.
N I, Zakharova, A K, Chibisov
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The Journal of Physical Chemistry B, 2007
Small-angle X-ray scattering (SAXS) was used to investigate the structure of isolated photosystem I (PSI) complexes stabilized in detergent solution. Two different types of PSI preparation were investigated. In the first preparation, thylakoid membranes were solubilized with Triton X100 and purified by density gradient centrifugation.
Hugh, O'Neill +4 more
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Small-angle X-ray scattering (SAXS) was used to investigate the structure of isolated photosystem I (PSI) complexes stabilized in detergent solution. Two different types of PSI preparation were investigated. In the first preparation, thylakoid membranes were solubilized with Triton X100 and purified by density gradient centrifugation.
Hugh, O'Neill +4 more
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The Journal of Physical Chemistry B, 2013
Photosynthetic structures when imaged with nonlinear optical microscopy give rise to high third harmonic generation (THG) signal intensity due to the presence of chlorophylls and xanthophylls which have large second hyperpolarizabilitiy (γ) values. The γ value of trimers of the light-harvesting chlorophyll a/b pigment-protein complex of photosystem II (
Danielle, Tokarz +3 more
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Photosynthetic structures when imaged with nonlinear optical microscopy give rise to high third harmonic generation (THG) signal intensity due to the presence of chlorophylls and xanthophylls which have large second hyperpolarizabilitiy (γ) values. The γ value of trimers of the light-harvesting chlorophyll a/b pigment-protein complex of photosystem II (
Danielle, Tokarz +3 more
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Biokhimiia (Moscow, Russia), 1977
Properties are studied of pterin-protein complex (PPC), possible precursor of ferredoxin in electrone transport chain PS-I. PPC is shown to form chelate complex with Fe ions which are capable to activate the process of light reduction of NADP+ by chloroplasts in the absence of ferrodoxin.
L F, Stakhov, A D, Makarov, B N, Ivanov
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Properties are studied of pterin-protein complex (PPC), possible precursor of ferredoxin in electrone transport chain PS-I. PPC is shown to form chelate complex with Fe ions which are capable to activate the process of light reduction of NADP+ by chloroplasts in the absence of ferrodoxin.
L F, Stakhov, A D, Makarov, B N, Ivanov
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Photosystem I protein films at electrode surfaces for solar energy conversion.
Langmuir, 2014G. LeBlanc +4 more
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