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Updated: Jul 20, 2026

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography
Published on: April 24, 2018
Improved diffraction of antithrombin crystals grown in microgravity.
M R Wardell1, R Skinner, D C Carter
1Department of Biochemistry and Molecular Biophysics, Washington University in St Louis, MO 63110-1093, USA. mrw@patmos.wustl.edu
Crystals of antithrombin grew better in microgravity. Microgravity conditions improved crystal diffraction, enabling higher resolution for structural studies.
Area of Science:
- Biophysics
- Crystallography
- Space Science
Background:
- Crystallization is crucial for determining protein structures.
- Antithrombin is a vital protein for blood regulation.
- Previous studies have explored microgravity's effect on crystal growth with variable results.
Purpose of the Study:
- To compare the quality and diffraction properties of antithrombin crystals grown on Earth versus in microgravity.
- To evaluate the effectiveness of a novel method for assessing crystal resolution from single diffraction images.
Main Methods:
- Growing antithrombin crystals under terrestrial and microgravity (US Space Shuttle Flight STS-67) conditions.
- Assessing crystal quality and indexing.
- Utilizing a new procedure to estimate Bragg scatter resolution from single diffraction images.
Main Results:
- Crystal quality was variable in both environments.
- Microgravity-grown crystals generally diffracted better than Earth-grown crystals.
- The best microgravity crystal diffracted to 2.6 angstroms, compared to 3 angstroms for the best Earth-grown crystal.
Conclusions:
- Microgravity conditions appear to promote more ordered crystal growth for antithrombin.
- The novel resolution estimation method is effective for evaluating crystal diffraction.
- Further research may explore other factors influencing crystal quality in microgravity.
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