Characterization of dislocations in monoclinic hen egg-white lysozyme crystals by synchrotron monochromatic-beam X-ray topography

✍ Scribed by Takuya Sawaura; Daiki Fujii; Mengyuan Shen; Yu Yamamoto; Kei Wako; Kenichi Kojima; Masaru Tachibana

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 575 KB
• Volume: 318
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2010.11.018

✦ Synopsis

Dislocations in monoclinic hen egg-white lysozyme crystals were investigated by means of synchrotron monochromatic-beam X-ray topography. The loop and curved dislocations were observed to be predominant in the crystals. Almost all the dislocations lay in (1 0 1 ¯) crystallographic plane, which corresponds to that with smallest slicing energy estimated by macrobond approach. One of the Burgers vectors of the dislocations was determined to be [0 1 0], which corresponds to the smallest lattice translational vector on the (1 0 1 ¯) plane. It is suggested that the loop and curved dislocations are slip ones introduced by a stress concentration during or after the growth.