Journal
ANNUAL REVIEW OF PHYSICAL CHEMISTRY
Volume 59, Issue -, Pages 387-410Publisher
ANNUAL REVIEWS
DOI: 10.1146/annurev.physchem.59.032607.093642
Keywords
X-ray diffraction microscopy; oversampling method; lensless imaging; phase retrieval; noncrystalline specimen; single-molecule imaging; X-ray free electron lasers
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In 1999, researchers extended X-ray crystallography to allow the imaging of noncrystalline specimens by measuring the X-ray diffraction pattern of a noncrystalline specimen and then directly phasing it using the oversampling method with iterative algorithms. Since then, the field has evolved moving in three important directions. The first is the 3D structural determination of noncrystalline materials, which includes the localization of the defects and strain field inside nanocrystals, and quantitative 3D imaging of disordered materials such as nanoparticles and biomaterials. The second is the 3D imaging of frozen-hydrated whole cells at a resolution of 10 nm or better. A main thrust is to localize specific multiprotein complexes inside cells. The third is the potential of imaging single large protein complexes using extremely intense and ultrashort X-ray pulses. In this article, we review the principles of this methodology, summarize recent developments in each of the three directions, and illustrate a few examples.
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