Journal
APPLIED SCIENCES-BASEL
Volume 12, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/app12052551
Keywords
megahertz repetition rate; XFEL; SPB; SFX scientific instrument; serial femtosecond crystallography; time-resolved serial femtosecond crystallography; sample delivery; liquid jet; pump-probe; photocage
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This perspective review discusses emerging techniques and future opportunities for time-resolved serial femtosecond crystallography experiments using high repetition rate XFEL sources. The efficient use of these sources for pump-probe experiments and mix-and-inject experiments is highlighted. The development of photocaged compounds is also being explored to expand the application of time-resolved serial femtosecond crystallography.
This perspective review describes emerging techniques and future opportunities for time-resolved serial femtosecond crystallography (TR-SFX) experiments using high repetition rate XFEL sources. High repetition rate sources are becoming more available with the European XFEL in operation and the recently upgraded LCLS-II will be available in the near future. One efficient use of these facilities for TR-SFX relies on pump-probe experiments using a laser to trigger a reaction of light-responsive proteins or mix-and-inject experiments for light-unresponsive proteins. With the view to widen the application of TR-SFX, the promising field of photocaged compounds is under development, which allows the very fast laser triggering of reactions that is no longer limited to naturally light-responsive samples. In addition to reaction triggering, a key concern when performing an SFX experiment is efficient sample usage, which is a main focus of new high repetition rate-compatible sample delivery methods.
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