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The S-1 split signa...
The S-1 split signal of photosystem II : a tyrosine-manganese coupled interaction
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Cox, Nicholas (author)
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- Ho, Felix M. (author)
- Uppsala universitet,Institutionen för fotokemi och molekylärvetenskap
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Pewnim, Naray (author)
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Steffen, Ronald (author)
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Smith, Paul J. (author)
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- Havelius, Kajsa G. V. (author)
- Uppsala universitet,Institutionen för fotokemi och molekylärvetenskap
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Hughes, Joseph L. (author)
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Debono, Lesley (author)
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- Styring, Stenbjörn (author)
- Uppsala universitet,Molekylär biomimetik
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Krausz, Elmars (author)
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Pace, Ron J. (author)
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(creator_code:org_t)
- Elsevier BV, 2009
- 2009
- English.
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In: Biochimica et Biophysica Acta - Bioenergetics. - : Elsevier BV. - 0005-2728 .- 1879-2650. ; 1787:7, s. 882-889
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Detailed optical and EPR analyses of states induced in dark-adapted PS II membranes by cryogenic illumination permit characterization and quantification of all pigment derived donors and acceptors, as well as optically silent (in the visible, near infrared) species which are EPR active. Near complete turnover formation of Q(A)(-) is seen in all centers, but with variable efficiency, depending on the donor species. In minimally detergent-exposed PS II membranes, negligible (<5%) oxidation of chlorophyll or carotenoid centers occurs for illumination temperatures 5-20 K. An optically silent electron donor to P680(+) is observed with the same decay kinetics as the S-1 split signal. Cryogenic donors to P680(+) seen are: (i) transient (t(1/2)similar to 150 s) tyrosine related species, including 'split signals' (similar to 15% total centers), (ii) reduced cytochrome b(559) (similar to 30-50% centers), and (iii) an organic donor, possibly an amino acid side chain, (similar to 30% centers).
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Andra medicinska och farmaceutiska grundvetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Other Basic Medicine (hsv//eng)
Keyword
- S-1 split signal
- Carotenoid
- Chlorophyll
- Cytochrome b(559)
- Pheophytin
- Tyrosine
- Exchange coupled interaction
- Chemistry
- Kemi
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Cox, Nicholas
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Ho, Felix M.
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Pewnim, Naray
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Steffen, Ronald
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Smith, Paul J.
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Havelius, Kajsa ...
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show more...
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Hughes, Joseph L ...
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Debono, Lesley
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Styring, Stenbjö ...
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Krausz, Elmars
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Pace, Ron J.
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show less...
- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Basic Medicine
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and Other Basic Medi ...
- Articles in the publication
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Biochimica et Bi ...
- By the university
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Uppsala University