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2015 | 2 | 1 |
Article title

Lamellar spacing of photosystem II membrane
fragments upon dehydration studied by neutron
membrane diffraction

Content
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EN
Abstracts
EN
The effect of dehydration on the lamellar spacing
of photosystem II (PS II) membrane fragments from
spinach has been investigated using neutron membrane
diffraction at room temperature. The diffraction data reveal
a major peak at a scattering vector Q of 0.049 Å−1
at a relative humidity (r.h.) of 90% corresponding to a
repeat distance D of about 129 Å. Upon dehydration to
44% r.h., this peak shifts to about 0.060 Å−1 corresponding
to a distance of 104.7±2.5 Å. Within experimental error,
the latter repeat distance remains almost the same
at hydration levels below 44% r.h. indicating that most
of the hydration water is removed. This result is consistent
with the earlier finding that hydration-induced conformational
protein motions in PS II membrane fragments
are observed above 44% r.h. and correlated with the onset
electron transfer in PS II (Pieper et al. 2008, Eur. Biophys.
J. 37: 657–663).
Publisher

Year
Volume
2
Issue
1
Physical description
Dates
accepted
3 - 11 - 2015
online
31 - 12 - 2015
received
6 - 10 - 2015
Contributors
author
  • Institute of Physics, University
    of Tartu, Tartu, Estonia
  • Institute of Physical Energetics, Riga, Latvia
author
  • Helmholtz-Zentrum Berlin für Materialien und Energie
    GmbH, Berlin, Germany
author
  • Max-Volmer-Laboratories, Technical University
    Berlin, Germany
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_1515_optof-2015-0005
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