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- W134650922 startingPage "323" @default.
- W134650922 abstract "Our knowledge of the diverse peripheral light-harvesting complexes (LHCs) found in species of algae which contain chlorophyll (Chi) c as an accessory pigment is reviewed. Sequencing of genes encoding intrinsic LHCs with three putative transmembrane helices is proceeding rapidly in all groups, but basic biochemistry, particularly of the LHC components attached to PS I-enriched complexes, is currently neglected. All LHCs appear to have two different environments for Chi c, and the longer wavelength forms (> 640 nm) have their Qy transition in the plane of the membrane, or the long axis of the particle. A limited amount of time-resolved spectroscopic data has been interpreted as excluding Chi c as an intermediate in energy transfer between either phycobilins or carotenoids and Chi a, but this may be premature. All the light-harvesting proteins seem to be encoded by multigene families, and for diatoms and brown algae, many genes have been sequenced. This will allow the role of individual gene products in determining the adaptive responses to environmental variation to be appraised. For those groups which possess an additional water-soluble antenna (cryptophytes and dinoflagellates), highresolution (<2.0 Å) structures of the antennas are available. These are directing theoretical and transient spectroscopic studies of some of the most fundamental aspects of light harvesting, and the unique peridinin-chlorophyll a-protein (PCP) has already received appreciable attention. The cryptophyte PE545 has recently been crystallized as an (α 1 β)((α 2 β) heterodimer, in distinct contrast to the (αβ)6 structure of cyanobacterial phycobilins. However, the comparable interchromophore distances suggest that the fundamentals of light harvesting will be similar in both groups. The lack of a structure for any of the intrinsic light-harvesting proteins with three helices, which are common to all the groups, is a serious drawback to understanding the detailed mechanisms of light-harvesting and the role of carotenoids in particular." @default.
- W134650922 created "2016-06-24" @default.
- W134650922 creator A5010937522 @default.
- W134650922 creator A5048774392 @default.
- W134650922 date "2003-01-01" @default.
- W134650922 modified "2023-09-23" @default.
- W134650922 title "Light-Harvesting Systems in Chlorophyll c-Containing Algae" @default.
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