Figure 1 - full size

 

Figure 1.
Figure 1 Native Patterson map created by XtalView (McRee, 1992[McRee, D. E. (1992). J. Mol. Graph. 10, 44-46.]) showing the strong Harker peak indicative of an NCS axis parallel to the crystallographic 2[1] screw axis.

The above figure is reprinted by permission from the IUCr: Acta Crystallogr D Biol Crystallogr (1999, 55, 122-128) copyright 1999.