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Purified proteins analyzed by SDS-PAGE on 12% acrylamide gels and stained with Coomassie blue. Lane 1, 10 μg of MMP1680; lane 2, 8.5 μg of His10-MMP1077; lane 3, 8 μg of His10-MJ1101; lane 4, protein markers corresponding to the indicated molecular masses; lane 5, 8 μg of MMP0705-His6; lane 6, 10 μg of His6-MMP0706; lane 7, protein markers.
