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Figure 3
UrdA room-temperature X-ray structures obtained in the presence of citrate. (a) UrdA′P crystals (2 µl drop) grown in ammonium citrate. (b) UrdA′S crystals (2 µl drop) grown in ammonium citrate. (c) Left: 2mFo − DFc map shown at 1σ. Right: mFo − DFc omit polder map shown for residues 410–412 as well as the phosphate and water molecules contoured at 3σ for the UrdA′S-RT structure under citrate conditions. Occupancies for each of the Arg411 alternatives are indicated by percentage values. (d) Left: 2mFo − DFc map shown at 1σ. Right: mFo − DFc omit polder map shown for residues 410–412 as well as for the chloride ion and water molecules contoured at 3σ for the UrdA′P-RT structure under citrate conditions.

Journal logoSTRUCTURAL
BIOLOGY
ISSN: 2059-7983
Volume 82| Part 6| June 2026| Pages 603-614
https://doi.org/10.1107/S2059798326003360
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