| Autor: |
Bryan A. Krantz, Matthew A. Coleman, Ching-Ju Tsai, Achini Opathalage, W. Henry Benner, T. Pardini, Garth J. Williams, James E. Evans, Brent W. Segelke, Michael Heymann, Xiao-Dan Li, Mark S. Hunter, Sébastien Boutet, Matthias Frank, Stefan P. Hau-Riege, Geoffrey K. Feld, Seth Fraden, Marc Messerschmidt, Bill Pedrini |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Journal of Applied Crystallography. 48:1072-1079 |
| ISSN: |
1600-5767 |
| DOI: |
10.1107/s1600576715010493 |
| Popis: |
X-ray free-electron lasers (XFELs) offer a new avenue to the structural probing of complex materials, including biomolecules. Delivery of precious sample to the XFEL beam is a key consideration, as the sample of interest must be serially replaced after each destructive pulse. The fixed-target approach to sample delivery involves depositing samples on a thin-film support and subsequent serial introduction via a translating stage. Some classes of biological materials, including two-dimensional protein crystals, must be introduced on fixed-target supports, as they require a flat surface to prevent sample wrinkling. A series of wafer and transmission electron microscopy (TEM)-style grid supports constructed of low-Z plastic have been custom-designed and produced. Aluminium TEM grid holders were engineered, capable of delivering up to 20 different conventional or plastic TEM grids using fixed-target stages available at the Linac Coherent Light Source (LCLS). As proof-of-principle, X-ray diffraction has been demonstrated from two-dimensional crystals of bacteriorhodopsin and three-dimensional crystals of anthrax toxin protective antigen mounted on these supports at the LCLS. The benefits and limitations of these low-Z fixed-target supports are discussed; it is the authors' belief that they represent a viable and efficient alternative to previously reported fixed-target supports for conducting diffraction studies with XFELs. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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