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Crystals of FaeE. (a) FaeE crystal form 1, grown in 0.1 M Tris pH 8.5, 50% MPD. (b) FaeE crystal form 2, grown in 0.1 M HEPES pH 7.5, 50% MPD, 0.05 M NH4H2PO4. (c) FaeE crystal form 3, grown in 0.1 M Tris pH 8.5, 50% MPD, 0.1 M NH4H2PO4 from drops initially containing the FaeE–FaeG complex. The black bars indicate 0.1 mm.
