Computer-controlled liquid-nitrogen drizzling device for removing frost from cryopreserved crystals

Area of Science:

• Structural Biology
• Crystallography

Background:

• Cryocrystallography is preferred over room-temperature methods in macromolecular crystallography.
• Key advantages include reduced radiation damage and simplified crystal handling for synchrotron experiments.
• Frost adhesion to crystals is a significant challenge, causing noisy diffraction images and obscuring crystal visibility.

Purpose of the Study:

• To address the issue of frost adhesion in cryocrystallography.
• To develop a method for improving crystal visibility and diffraction data quality.

Main Methods:

• Development of a computer-controlled device for drizzling liquid nitrogen.
• Application of the device to remove frost from mounted crystals.

Main Results:

• The device effectively removes frost from cryocrystallographic samples.
• Reduction in noise from ice rings in diffraction images was observed.
• Improved optical visibility of crystals facilitated centering for X-ray alignment.

Conclusions:

• The developed device successfully mitigates frost-related issues in cryocrystallography.
• This technology enhances the reliability and efficiency of macromolecular crystallography experiments.
• The method improves data quality and experimental success rates at synchrotrons.