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"Cluster-ion" bombardment of biological macromolecules: Morphological evidence for disassembly of single tobacco mosaic virus particles.

"Cluster-ion" bombardment of biological macromolecules: Morphological evidence for disassembly of single tobacco mosaic virus particles.

Proceedings of the National Academy of Sciences of the United States of America (1987-01-01)

M C Ledbetter, R J Beuhler, L Friedman

摘要

Cluster ions containing 50, 100, or 200 water molecules and one proton are accelerated to over 275 kV and impacted on thin carbon films on which tobacco mosaic virus has been dispersed. After bombardment the films are examined with a transmission electron microscope to study induced morphological alterations with respect to the energy transfer processes that take place during and after single cluster-ion impact. Observations on tobacco mosaic virus indicate that a single cluster impact results in the removal of a cylindrical segment of the virus. No fragments from the excised TMV segment were observed on the carbon foil. We speculate that cluster-ion bombardment may become a useful analytical technique for structural studies of large biological macromolecular complexes.

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碳, foil, 5x5mm, thickness 2.0mm, hOpg

碳, foil, 10x10mm, thickness 2.0mm, hOpg

碳, foil, 100x100mm, thickness 0.5mm, flexible graphite, 99.8%

碳, foil, 25x25mm, thickness 0.5mm, pyrolytic graphite, 99.99%

碳, foil, not light tested, 100x100mm, thickness 0.075mm, flexible graphite, 99.8%

碳, foil, 50x50mm, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 15x15mm, thickness 2.0mm, hOpg

碳, foil, 5x10mm, thickness 2.0mm, hOpg

碳, foil, 50x50mm, thickness 0.1mm, pyrolytic graphite, 99.99%

碳, foil, 100x100mm, thickness 0.125mm, rigid graphite, fine grain size, 99.95%

碳, foil, 50x50mm, thickness 0.2mm, pyrolytic graphite, 99.99%

碳, foil, 6mm disks, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, not light tested, 150x150mm, thickness 0.075mm, flexible graphite, 99.8%

碳, foil, 100x100mm, thickness 1.0mm, flexible graphite, 99.8%

碳, foil, 25x25mm, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 100x100mm, thickness 0.25mm, rigid graphite, fine grain size, 99.95%

碳, foil, 100x100mm, thickness 2.5mm, rigid graphite, fine grain size, 99.95%

碳, foil, 150x150mm, thickness 1.0mm, rigid graphite, fine grain size, 99.95%

碳, foil, 50x50mm, thickness 0.35mm, flexible graphite, 99.8%

碳, foil, 50mm disks, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 150x150mm, thickness 0.35mm, flexible graphite, 99.8%

碳, foil, 25x25mm, thickness 2.5mm, rigid graphite, fine grain size, 99.95%

碳, foil, 12mm disks, thickness 0.5mm, rigid graphite, fine grain size, 99.95%

碳, foil, 4mm disks, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 100x100mm, thickness 5.0mm, rigid graphite, medium grain size, 99.5%

碳, foil, 150x150mm, thickness 0.25mm, rigid graphite, fine grain size, 99.95%

碳, foil, 150x150mm, thickness 1.0mm, flexible graphite, 99.8%

碳, foil, 25x25mm, thickness 0.5mm, rigid graphite, fine grain size, 99.95%

碳, foil, 500x500mm, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 50x50mm, thickness 0.125mm, rigid graphite, fine grain size, 99.95%