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Figure 3.
FIG. 3. The least squares superimposed structures of
wild-type human Mn-SOD (purple) and H30N/Y166F Mn-SOD (yellow)
showing residues in the active site. Similar to Asn171(B) in the
single mutant, this side chain turned toward subunit A in the
double mutant, but there is no hydrogen bond between Asn171(B)
and Asn30(A). Instead, the N  -2 of Asn30 formed a
weak hydrogen bond with the phenolic OH of Tyr34.
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