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Figure 2.
Fig. 2. Electron density for the two sulfate ions bound o olecule
A o apo-azurin, taken from an omit map in which these ions
di not contribute to the phasing. (a) The sulfate ion, which is
also found in the oxidized and reduced holo-azurin structures,
bound to His 83N e2 and Gly 76NH. (b) The sulfate ion bound
betwen Lys 56 and Lys 122, with a thrd Lys side chain (from
Lys 38 of a neighbouring molecule) and a water olecule
completing the ite.
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