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Gallery of various GlpT crystal forms after initial crystallization screen. Twenty percent glycerol and 5% MPD were present in all the drops including the following: (A) In DDM, 19% PEG 2000MME, and 100 mM Bis-Tris (pH 6.0); (B) In DDM, 19% PEG 2000MME, 100 mM Bis-Tris (pH 6.0), and 0.5 mM (NH4)2SO4; (C) In DDM, 25% PEG 3350 and 100 mM Tris (pH 8.0); (D) In C12E9, 25% PEG 2000MME, 100 mM Tris (pH 8.5). All pictures were recorded at the same magnification. Bar, 150 μm.
