Analysis of dislocation images in X-ray topography of protein crystals: Tetragonal hen egg-white lysozyme crystals

H. Koizumi, M. Tachibana, I. Yoshizaki, K. Kojima

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Dislocation images in X-ray topography of protein crystals such as tetragonal hen egg-white lysozyme crystals were analyzed. Not only extinction but also double contrast of dislocation images are clearly observed on the X-ray topographs. It should be noted that the observed image widths of the dislocation contrasts are much less than those calculated on the basis of the kinematical theory in X-ray topography, which has been successfully applied for inorganic crystals and organic crystals of small molecules so far. Moreover, in tetragonal HEW lysozyme crystals, the rocking curve widths of the perfect crystal related to the kinematical theory are less than the measured ones by two orders of magnitude. This discrepancy is consistent with that in the image width of the dislocation contrast. From this correlation, it is suggested that the larger rocking curve width, or higher mosaicity, is mainly responsible for the observed image width in the grown crystals.

本文言語English
ページ(範囲)3709-3717
ページ数9
ジャーナルPhilosophical Magazine
85
31
DOI
出版ステータスPublished - 2005 11月 1

ASJC Scopus subject areas

  • 凝縮系物理学

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