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Figure 1
Electron-density maps and models for the three disulfide bonds in TcAChE, viz. Cys402—Cys521, Cys254—Cys265 and Cys67—Cys94, for the first (A) and last (I) of a series of nine data sets collected on a single crystal at 100 K. Electron-density maps are contoured at a level of 1.5σ. During structure refinement, the S atoms were not restrained to form disulfide bonds and their van der Waals radii were set to zero in order to avoid repulsion. The programs MOLSCRIPT (Kraulis, 1991BB19), BOBSCRIPT (Kraulis, 1991BB19; Esnouf, 1999BB12) and RASTER3D (Merritt & Bacon, 1997BB20) were used to produce figures from electron-density maps calculated using CNS (Brünger et al., 1998BB8).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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