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http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3956Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.creator | Yruela Guerrero, Inmaculada | - |
| dc.creator | Torrado Plou, Elena | - |
| dc.creator | Roncel Gil, Mercedes | - |
| dc.creator | Picorel Castaño, Rafael | - |
| dc.date | 2008-04-30T14:10:51Z | - |
| dc.date | 2008-04-30T14:10:51Z | - |
| dc.date | 2001-03 | - |
| dc.date.accessioned | 2017-01-31T01:06:38Z | - |
| dc.date.available | 2017-01-31T01:06:38Z | - |
| dc.identifier | Photosynthesis Research 67(3): 199-206, 2001 | - |
| dc.identifier | 0166-8595 (print version) | - |
| dc.identifier | 1573-5079 (electronic version) | - |
| dc.identifier | http://hdl.handle.net/10261/3956 | - |
| dc.identifier | 10.1023/A:1010682416016 | - |
| dc.identifier.uri | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3956 | - |
| dc.description | The definitive version is available at: http://www.springerlink.com/content/l304h18744r52202/fulltext.html | - |
| dc.description | The light-induced difference absorption spectra associated to the photo-accumulation of reduced pheophytin a were studied in the isolated D1–D2–Cyt b559 complex in the presence of variable methyl viologen concentrations and different illumination conditions under anaerobiosis. Depending on the methyl viologen/reaction centre ratio, the relative intensities of the spectral bands at 681.5±0.5, 667.0±0.5 and 542.5±0.5 nm were modified. The reduced pheophytin a located at the D1-branch of the complex absorbs at 681.7±0.5 nm, and at least two additional pigment species contribute to the Qy band of the difference absorption spectra with maxima at 667.0±0.5 and 680.5±0.5 nm. We propose the additional species correspond to a peripheral chlorophyll a and the pheophytin a located at the D2-branch of the complex, respectively. The blue absorbing chlorophyll at 667 nm is susceptible to chemical redox changes with a midpoint reduction potential of +470 mV. The Qx absorption bands of both pheophytins localised at the D2- and D1-branch of the D1–D2–Cyt b559 complex were at 540.7±0.5 and 542.9±0.5, respectively. The results indicated that the two pheophytin molecules can be photoreduced in the D1–D2–Cyt b559 complex in certain experimental conditions. | - |
| dc.description | This work was supported by the Dirección General de Investigación Científica y Técnica (Grant PB98-1632). | - |
| dc.description | Peer reviewed | - |
| dc.format | 321506 bytes | - |
| dc.format | application/pdf | - |
| dc.language | eng | - |
| dc.publisher | Springer | - |
| dc.rights | openAccess | - |
| dc.subject | Absorption | - |
| dc.subject | Chlorophyll | - |
| dc.subject | Pheophytin | - |
| dc.subject | Photosystem II | - |
| dc.subject | Reaction centre | - |
| dc.subject | Spectroscopy | - |
| dc.title | Light-induced absorption spectra of the D1-D2-cytochrome b559 complex of the Photosystem II: Effect of methyl viologen concentration | - |
| dc.type | Artículo | - |
| Appears in Collections: | Digital Csic | |
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