Figure 1 - full size

 

Figure 1.
Figure 1 (a) Cartoon diagram of HpA. The colouring scheme is from blue (N-terminus) to red (C-terminus). The active-site location is indicated by the bound L-Asp (shown in stick representation). Secondary-structure elements were assigned with DSSP (Kabsch & Sander, 1983[Kabsch, W. & Sander, C. (1983). Biopolymers, 22, 2577-2637.]). (b) Cartoon representation of the HpA tetramer. Each monomer is shown in a different colour. The orientation of the blue-coloured monomer is the same as in (a). The blue-salmon and green-magenta pairs correspond to intimate dimers. L-Asp is depicted as a space-filling model. The same structure after a 90° rotation is shown on the right. This figure was created with PyMOL v.0.99 (DeLano Scientific, Palo Alto, California, USA).

The above figure is reprinted by permission from the IUCr: Acta Crystallogr D Biol Crystallogr (2009, 65, 1253-1261) copyright 2009.