Sample-minimizing co-flow cell for time-resolved pump–probe X-ray solution scattering

A fundamental problem in biological sciences is understanding how macromolecular machines work and how the structural changes of a molecule are connected to its function. Time-resolved techniques are vital in this regard and essential for understanding the structural dynamics of biomolecules. Time-r...

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Veröffentlicht in:Journal of synchrotron radiation 2023-02, Vol.30 (2)
Hauptverfasser: Kosheleva, Irina, Henning, Robert, Kim, Insik, Kim, Seong Ok, Kusel, Michael, Srajer, Vukica
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creator Kosheleva, Irina
Henning, Robert
Kim, Insik
Kim, Seong Ok
Kusel, Michael
Srajer, Vukica
description A fundamental problem in biological sciences is understanding how macromolecular machines work and how the structural changes of a molecule are connected to its function. Time-resolved techniques are vital in this regard and essential for understanding the structural dynamics of biomolecules. Time-resolved small- and wide-angle X-ray solution scattering has the capability to provide a multitude of information about the kinetics and global structural changes of molecules under their physiological conditions. However, standard protocols for such time-resolved measurements often require significant amounts of sample, which frequently render time-resolved measurements impossible. A cytometry-type sheath co-flow cell, developed at the BioCARS 14-ID beamline at the Advanced Photon Source, USA, allows time-resolved pump–probe X-ray solution scattering measurements to be conducted with sample consumption reduced by more than ten times compared with standard sample cells and protocols. The comparative capabilities of the standard and co-flow experimental setups were demonstrated by studying time-resolved signals in photoactive yellow protein.
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subjects Instruments & Instrumentation
Optics
Physics
title Sample-minimizing co-flow cell for time-resolved pump–probe X-ray solution scattering
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