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Chromatic adaptation of photosynthetic membranes | | Simon Scheuring
; James N Sturgis
; | | Date: |
15 Jul 2005 | | Journal: | Science, 309 (5733), 484-7 | | Abstract: | Many biological membranes adapt in response to environmental conditions. We investigated how the composition and architecture of photosynthetic membranes of a bacterium change in response to light, using atomic force microscopy. Despite large modifications in the membrane composition, the local environment of core complexes remained unaltered, whereas specialized paracrystalline light-harvesting antenna domains grew under low-light conditions. Thus, the protein mixture in the membrane shows eutectic behavior and can be mimicked by a simple model. Such structural adaptation ensures efficient photon capture under low-light conditions and prevents photodamage under high-light conditions. | | Source: | PubMed, pmid16020739 doi: 10.1126/science.1110879 | | Services: | Forum | Review | Favorites | |
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