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@ARTICLE{Engilberge:1025965,
author = {Engilberge, Sylvain and Caramello, Nicolas and Bukhdruker,
Sergei and Byrdin, Martin and Giraud, Thierry and Jacquet,
Philippe and Scortani, Damien and Biv, Rattana and Gonzalez,
Hervé and Broquet, Antonin and van der Linden, Peter and
Rose, Samuel L. and Flot, David and Balandin, Taras and
Gordeliy, Valentin and Lahey-Rudolph, J. Mia and Roessle,
Manfred and de Sanctis, Daniele and Leonard, Gordon A. and
Mueller-Dieckmann, Christoph and Royant, Antoine},
title = {{T}he {TR}- ic {OS} setup at the {ESRF}: time-resolved
microsecond {UV}–{V}is absorption spectroscopy on protein
crystals},
journal = {Acta crystallographica / Section D},
volume = {80},
number = {1},
issn = {0907-4449},
address = {Bognor Regis},
publisher = {Wiley},
reportid = {FZJ-2024-03243},
pages = {16 - 25},
year = {2024},
abstract = {The technique of time-resolved macromolecular
crystallography (TR-MX) has recently been rejuvenated at
synchrotrons, resulting in the design of dedicated
beamlines. Using pump-probe schemes, this should make the
mechanistic study of photoactive proteins and other suitable
systems possible with time resolutions down to microseconds.
In order to identify relevant time delays, time-resolved
spectroscopic experiments directly performed on protein
crystals are often desirable. To this end, an instrument has
been built at the icOS Lab (in crystallo Optical
Spectroscopy Laboratory) at the European Synchrotron
Radiation Facility using reflective focusing objectives with
a tuneable nanosecond laser as a pump and a microsecond
xenon flash lamp as a probe, called the TR-icOS
(time-resolved icOS) setup. Using this instrument,
pump-probe spectra can rapidly be recorded from single
crystals with time delays ranging from a few microseconds to
seconds and beyond. This can be repeated at various laser
pulse energies to track the potential presence of artefacts
arising from two-photon absorption, which amounts to a power
titration of a photoreaction. This approach has been applied
to monitor the rise and decay of the M state in the
photocycle of crystallized bacteriorhodopsin and showed that
the photocycle is increasingly altered with laser pulses of
peak fluence greater than 100 mJ cm-2, providing
experimental laser and delay parameters for a successful
TR-MX experiment.},
cin = {IBI-7},
ddc = {530},
cid = {I:(DE-Juel1)IBI-7-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
pubmed = {38088897},
UT = {WOS:001168282500003},
doi = {10.1107/S2059798323010483},
url = {https://juser.fz-juelich.de/record/1025965},
}