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Purification and identification of α2-M. A: Identification of Cohn fraction IV through two-dimensional electrophoresis; B: Purity identification of final product through SDS-PAGE (a: 5 µg final product, b: 10 µg final product, c: 15 µg final product, d: 15 µg α2-M standard); C: Identification of final product through LC-ESI-MS/MS analysis.
