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Spectroscopic Evide...
Spectroscopic Evidence for a Redox-Controlled Proton Gate at Tyrosine D in Photosystem II
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- Sjöholm, Johannes (författare)
- Uppsala universitet,Stockholms universitet,Institutionen för biokemi och biofysik,Molekylär biomimetik
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- Mamedov, Fikret (författare)
- Uppsala universitet,Molekylär biomimetik
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- Styring, Stenbjörn (författare)
- Uppsala universitet,Molekylär biomimetik
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(creator_code:org_t)
- 2014-09-05
- 2014
- Engelska.
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Ingår i: Biochemistry. - : American Chemical Society (ACS). - 0006-2960 .- 1520-4995. ; 53:36, s. 5721-5723
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Tyrosine D (TyrD) is one of two well-studied redox active tyrosines in Photosystem II. TyrD shows redox kinetics much slower than that of its homologue, TyrZ, and is normally present as a stable deprotonated radical (TyrD). We have used time-resolved continuous wave electron paramagnetic resonance and electron spin echo envelope modulation spectroscopy to show that deuterium exchangeable protons can access TyrD on a time scale that is much faster (50100 times) than that previously observed. The time of H/D exchange is strongly dependent on the redox state of TyrD. This finding can be related to a change in position of a water molecule close to TyrD.
Ämnesord
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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