Figure 1 - full size

Figure 1.
Figure 1. Structure of CuHah1. Monomer A is shown in blue and monomer B is shown in yellow. The copper ion is shown as a cyan sphere, and the four Cys residues in the two MT/HCXXC motifs are shown as ball-and-stick representations. a, Stereo view with the noncrystallographic two-fold axis running vertically. b, Viewed 90° from the orientation in (a), looking down the molecular twofold axis.