Biochimica et Biophysica Acta (BBA) - Bioenergetics
Heterogeneity among photosystem I
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Transcriptome analysis of changes in M. aeruginosa growth and microcystin production under low concentrations of ethinyl estradiol
2023, Science of the Total EnvironmentFragmentation and separation analysis of the photosynthetic membrane from spinach
2009, Biochimica et Biophysica Acta - BioenergeticsCitation Excerpt :The margin fractions have a much higher PSI/PSII ratio, 1.4–1.9, (Fig. 5, Table 1) compared to 1.13 for the whole thylakoid [31] yet they both have about the same Chl a/b ratios (2.9–3.2). This is due to that PSI in the margin vesicles (PSIα) is connected to LHCII [15,16] about 2 LHCII trimers per PSI reaction centre [31]. Since LHCII has a low Chl a/b ratio, 1.33 according to the crystal structure [51], its presence in PSIα will confer upon the margin vesicles a lower Chl a/b ratio than expected from their high PSI/PSII ratio.
Phosphorylation-dependent regulation of excitation energy distribution between the two photosystems in higher plants
2008, Biochimica et Biophysica Acta - BioenergeticsDimeric and monomeric organization of photosystem II: Distribution of five distinct complexes in the different domains of the thylakoid membrane
2006, Journal of Biological ChemistryCitation Excerpt :All thylakoid fractions were prepared without any detergent to preserve the membrane as intact as possible. The membranes were mechanically broken by sonication and then purified by an aqueous two-phase system to isolate the grana and the stroma lamellae fractions as described in Refs. 6, 34, and 35. The grana fraction was further purified according to Refs. 6 and 36 to isolate the grana core and the grana margin fractions.
Quantification of photosystem I and II in different parts of the thylakoid membrane from spinach
2004, Biochimica et Biophysica Acta - BioenergeticsCitation Excerpt :Therefore, our data allowed calculation of the antenna size of the two photosystems in the following way. It is known from earlier studies [8,37] that the antennae size of PSI in the grana (NI for PSIα) is about 40% larger, i.e. 300. That the antennae of PSI in the grana (PSIα) is larger than PSI in the stroma lamellae (PSIβ) is a result of attachment of LHCII trimers (Lhcb,1,2) to PSIβ.
Quenching of excited states of chlorophyll molecules in submembrane fractions of Photosystem I by exogenous quinones
2003, Biochimica et Biophysica Acta - BioenergeticsCitation Excerpt :The PSI submembrane fractions used in this study originated from stroma lamellae. Despite the differences between PSIα and to PSIβ found in both electron transfer processes and antenna size [33,34], it seems unlikely that PSI complexes from the grana margins would not respond to oxidized quinone molecules. This question must be, however, further clarified.