A crystal clear view
Article Abstract:
Rhee and colleagues have reported an electron crystallographic analysis providing insight into the three dimensional structure of the plant photosystem II (PSII) complex. They have found that PSII D1 and D2 subunit proteins are similar to L and M bacterial subunits. There is also a match between helices ascribed to CP47 and the helices of the PS1 PsA/B subunits, indicating that PsA/B evolved from the gene fusion of CP43/47-like proteins.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Water stress inhibits plant photosynthesis by decreasing coupling factor and ATP
Article Abstract:
Plant metabolism is substantially altered by water stress. The mechanisms by which stress decreases photosynthetic assimilation of CO2 are controversial. It is shown than in leaves of sunflower, stress decreases CO2 assimilation more than it slows O2 evolution, and there is now reversal by high concentrations of CO2. ATP-synthase is found to decrease with stress.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Proton-powered turbine of a plant motor
Article Abstract:
It has been possible to image the ATP synthase from leaf chloroplasts by using atomic force microscopy. It was found that its turbine has 14 subunits, arranged in a cylindrical ring.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Distribution of mule deer in relation to water sources in northern California. Survival and cause-specific mortality of neonatal mule deer fawns, north-central New Mexico
- Abstracts: The balance of plankton respiration and photosynthesis in the open oceans. Harvesting sunlight safely
- Abstracts: Growth through learning. Modulation of A-type potassium channels by a family of calcium sensors. A neuronal analogue of state-dependent learning
- Abstracts: Checkpoint for invasion. Phosphoglycerate Kinase acts in tumour angiogenesis as a disulphide reductase. Structural mimicry in bacterial virulence
- Abstracts: Evolution of leaf-form in land plants linked to atmospheric CO2 decline in the Late Palaeozoic era