phycobilisome

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phycobilisome

[‚fī·kō′bil·ē‚sōm]
(biochemistry)
A light-harvesting structure containing aggregates of photosynthetic accessory pigments that is located on the surface of thylakoid membranes in all cyanobacteria and red algae.
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Studies on the isolation of and spectral characteristics of phycobilisomes from Nostoc flagelliforme.
For example, the presence of phycobilisomes in the light-harvesting system of red algae and cyanobacteria results in generally lower maximal quantum yields (Fv/Fm) than that measured in green and brown algae (Buchel & Wilhem, 1993).
PBPs assemble to be supramolecular complexes called phycobilisomes and perform in the light harvesting and energy transfer processes in PSII.
The three major phycobiliproteins commonly found in cyanobacterial phycobilisomes are; Phycocyanin (PC), Allophycocyanin (APC) and Phycoerythrin (PE).
Their topics include phycobilisomes from cyanobateria, applying genetic tools to cyanobacterial biotechnology and ecology, the status and potential of cyanobacteria and their toxins as agents of bioterrorism, whether or not cyanobacteria in microbial mats can really degrade crude oil, bioluminescence reporter systems for monitoring the gene expression profile in cyanobacteria, a preliminary survey of the economic viability of large-scale photobiological hydrogen production using cyanobacteria raised in marine environments, and advances in marine symbiotic cyanobacteria.
Spectroscopic properties of the c-phycocyanin-allophycocyanin conjugate and the isolated phycobilisomes from Spirulina platensis.
Large aggregates of phycoerythrins can be prepared by covalent linkage (10) or by chemically stabilizing naturally occurring phycobilisomes, a naturally aggregated form of phycoerythrin isolated from algae, and the aggregates conjugated to binding proteins to produce reagents with very high fluorescence response (11, 12).
Mercury, at a low concentration (3 [micro]M), enhanced the intensity of room-temperature fluorescence emitted by phycocyanin and induced a blue shift in the emission peak of Spirulina cells, indicating alterations in the energy transfer within the phycobilisomes.
Phycobilisomes are photosynthetic antennae complexes of red algae and cyanobacteria (1-3).