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Diffraction patterns from LptA crystals. (a) Crystals of LptA grown in 0.4 M potassium sodium tartrate, 0.1 M HEPES–HCl pH 7.5. (b, c) Diffraction patterns of LptA crystals soaked in the dehydrating solution (0.3 M potassium sodium tartrate, 0.075 M HEPES–HCl pH 7.5, 25% glycerol) in air for 0 min (b) and 1 h (c).
