Results 31 to 40 of about 21,007 (242)

A chlorophyll-protein complex lacking in photosystem I mutants of Chlamydomonas reinhardtii. [PDF]

open access: yesThe Journal of cell biology, 1975
Sodium dodecyl sulfate gel electrophoresis of unheated, detergent-solubilized thylakoid membranes of Chlamydomonas reinhardtii gives two chlorophyll-protein complexes. Chlorophyll-protein complex I (CP I) is the blue-green in color and can be dissociated by heat into "free" chlorophyll and a constituent polypeptide (polypeptide 2; mol wt 66,000 ...
N H, Chua, K, Matlin, P, Bennoun
openaire   +2 more sources

Functional and structural changes in chloroplasts of senescent tobacco leaves

open access: yesActa Societatis Botanicorum Poloniae, 2015
The relationship between the structure and the function of chloroplasts of aging tobacco leaves was studied. From the observations of chloroplast structure in electron microscope, the results of other authors concerning earlier degradation of stroma ...
Danuta Wolińska
doaj   +1 more source

Oxidative Stress- and Autophagy-Inducing Effects of PSI-LHCI from Botryococcus braunii in Breast Cancer Cells

open access: yesBioTech, 2022
Botryococcus braunii (B. braunii) is a green microalga primarily found in freshwater, reservoirs, and ponds. Photosynthetic pigments from algae have shown many bioactive molecules with therapeutic potential.
Freisa M. Joaquín-Ovalle   +11 more
doaj   +1 more source

New Water Oxidation Mechanism in Photosystem II Resolves Major Experimental Controversies

open access: yesAngewandte Chemie, EarlyView.
In Photosystem II Oxygen Evolving Complex, we discovered the O3‐O6 peroxide at lower energy. Assignment of the O3 ligated by histidine (His337) as a slow exchanging substrate and its coupling with O6 give the O─O bond formation mechanism most consistent with all currently available experimental data. Proposal shows how protein environment can steer the
Yulia Pushkar
wiley   +2 more sources

Water, Alcohols, Amines, and Amides as Formal Hydrogen‐Atom‐Transfer Reagents Through Activation With Redox‐Active Lewis Acids

open access: yesAngewandte Chemie, EarlyView.
Protic molecules containing strong O─H or N─H bonds typically resist hydrogen‐atom abstraction because of the high reactivity of the resulting heteroatom‐centered radicals. However, association of the protic molecules with redox‐active Lewis acids can provide powerful hydrogen‐atom donors or proton‐coupled‐electron‐transfer reagents.
Petra Vojáčková, Armido Studer
wiley   +2 more sources

A novel chloroplast super-complex consisting of the ATP synthase and photosystem I reaction center.

open access: yesPLoS ONE, 2020
Several 'super-complexes' of individual hetero-oligomeric membrane protein complexes, whose function is to facilitate intra-membrane electron and proton transfer and harvesting of light energy, have been previously characterized in the mitochondrial ...
Satarupa Bhaduri   +5 more
doaj   +1 more source

Stimuli‐Induced Subconformation Transformation of the PSI‐LHCI Protein at Single‐Molecule Resolution

open access: yesAdvanced Science, 2023
Photosynthesis is a very important process for the current biosphere which can maintain such a subtle and stable circulatory ecosystem on earth through the transformation of energy and substance.
Zhiheng Yang   +8 more
doaj   +1 more source

Localization and Topology of Thylakoid Membrane Proteins in Land Plants

open access: yesBio-Protocol, 2014
Thylakoids are a formation of flattened membrane vesicles and protein complexes found in cyanobacteria, algae and plants. In the chloroplasts of land plants the thylakoid membrane systems form a network of densely packed stacks called grana lamellae ...
Salar Torabi   +2 more
doaj   +1 more source

Receptor for Activated C Kinase1B (RACK1B) Delays Salinity-Induced Senescence in Rice Leaves by Regulating Chlorophyll Degradation

open access: yesPlants, 2023
The widely conserved Receptor for Activated C Kinase1 (RACK1) protein is a WD-40 type scaffold protein that regulates diverse environmental stress signal transduction pathways.
Md Ahasanur Rahman, Hemayet Ullah
doaj   +1 more source

Chlorophyll-Protein Complexes of a Photosystem II Mutant of Maize [PDF]

open access: yesPlant Physiology, 1984
Use of the octyl beta-d-glucopyranoside solubilization procedure of Camm and Green (1980 Plant Physiol 66: 428-432) reveals that thylakoid membranes of a photosystem (PS) II-deficient maize (Zea mays L.) mutant lack two chlorophyll protein (CP) complexes associated with PSII, i.e. CPa-1 and CPa-2.
J G, Metz, R W, Krueger, D, Miles
openaire   +2 more sources

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