A setup for millisecond time‐resolved X‐ray solution scattering experiments at the CoSAXS beamline at the MAX IV Laboratory.

The function of biomolecules is tightly linked to their structure, and changes therein. Time‐resolved X‐ray solution scattering has proven a powerful technique for interrogating structural changes and signal transduction in photoreceptor proteins. However, these only represent a small fraction of the biological macromolecules of interest. More recently, laser‐induced temperature jumps have been introduced as a more general means of initiating structural changes in biomolecules. Here we present the development of a setup for millisecond time‐resolved X‐ray solution scattering experiments at the CoSAXS beamline, primarily using infrared laser light to trigger a temperature increase, and structural changes. We present results that highlight the characteristics of this setup along with data showing structural changes in lysozyme caused by a temperature jump. Further developments and applications of the setup are also discussed. [ABSTRACT FROM AUTHOR]