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Purification of the protein capable of preventing aggregation. Fractions from the purification steps were separated by SDS-PAGE and stained with Coomassie brilliant blue. The amounts of protein applied to the lanes of the gel from left (periplasm) to right (phenyl Sepharose) were 20, 15, 15, 5, and 5 μg, respectively. The migration positions of molecular mass marker proteins are shown to the left of the gel.
