Fig. 4. Secondary Zn2+ binding sites in the structures of ESA. Sites are numbered as in Table 3; only those coordinated by at least two protein residues are shown. Residues are shown in sticks representation, zinc ion in grey, oxygen in red, nitrogen in dark blue, carbon in green. Coordination bonds are marked with black dashed lines. Grey grid represents 2mfo – dfc map (σ – 1.0), orange – anomalous map (σ – 3.0). Residue numbers refer to HSA; in case of non-conserved residues, the HSA amino acid is given in parentheses.
