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(a) Crystals of SBT3 grown in 0.1 M Bicine pH 9.0, 10%(w/v) PEG 6000 at 293 K. These crystals did not diffract beyond 6 Å resolution. (b) Crystals of SBT3 grown in 0.1 M Bicine pH 8.4, 10%(w/v) PEG 6000, 2.0 M NaCl at 277 K. These crystals diffracted to 4 Å resolution. The scale bar is 100 µm in length.
