Figure 1
A ribbon representation (Carson, 1991) of the dodecamer structure of type II DHQase from S. coelicolor viewed down the threefold axis (a) and down a twofold axis (b). To the right of each dodecamer view is a five-sphere tetrahedral-shaped model of the structure. A small central sphere represents the centroid of the dodecamer; the four surrounding spheres (which are joined to the centroid by lines) represent the position of the threefold axes. |