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Crystallization of Fab 3-53/A27. (a) Crystals from MMS with Fab 3-23/A27 seeds in 30% PEG 4000, 0.2 M AmSO4. (b) Crystals from MMS with self-seeds in 2.0 M AmSO4, 0.1 M NaAct pH 4.5. (c) Crystals from refinement screening with self-seeds in 19% PEG 4000, 0.2 M AmSO4, 0.1 M NaAct pH 4.5.
