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Figure 7
Conserved and nonconserved interactions in PDB entries 9ec1 (a, d), 3uul (b, e) and 3uun (c, f). (a)–(c) show conserved residues which are predicted to form salt bridges in PDB entries 9ec1 and 3uul. (Salt bridges are represented by yellow dashed lines. Red atoms are oxygen and blue atoms are nitrogen.) (d)–(f) show the position usually occupied by a conserved tryptophan that clusters with other hydrophobic residues (green), as observed in PDB entries 3uul and 3uun. In PDB entry 9ec1, the same position is instead occupied by a lysine residue (blue) that could interact with a nearby glutamic acid (red) within the same helix.

Journal logoSTRUCTURAL BIOLOGY
COMMUNICATIONS
ISSN: 2053-230X
Volume 82| Part 5| May 2026| Pages 184-193
https://doi.org/10.1107/S2053230X26003262
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