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1 2 3 kDa 116 - 66 - 45 - 35 - 18 - Figure S2. Figure S2. SDS-PAGE of the recombinant AOMT. Lanes: (1) protein size markers; (2) total protein extract of E. coli expressing the NusA-AOMT fusion protein; (3) purified AOMT after thrombin cleavage. The molecular weights of the markers are indicated in kDa and the arrow indicates the position of the NusA-AOMT fusion protein.