Journal
JOURNAL OF APPLIED CRYSTALLOGRAPHY
Volume 50, Issue -, Pages 1075-1083Publisher
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1600576717007506
Keywords
serial crystallography; SFX; materials science; structural biology
Categories
Funding
- Helmholtz Association through programme oriented funds
- BMBF ['SyncFELMed' 05K14CHA]
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A novel algorithm for indexing multiple crystals in snapshot X-ray diffraction images, especially suited for serial crystallography data, is presented. The algorithm, FELIX, utilizes a generalized parametrization of the Rodrigues-Frank space, in which all crystal systems can be represented without singularities. The new algorithm is shown to be capable of indexing more than ten crystals per image in simulations of cubic, tetragonal and monoclinic crystal diffraction patterns. It is also used to index an experimental serial crystallography dataset from lysozyme microcrystals. The increased number of indexed crystals is shown to result in a better signal-to-noise ratio, and fewer images are needed to achieve the same data quality as when indexing one crystal per image. The relative orientations between the multiple crystals indexed in an image show a slight tendency of the lysozme microcrystals to adhere on (110) facets.
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