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Purification of acetone carboxylase of A. aromaticum. Fractions were analyzed by SDS-PAGE (13.5% polyacrylamide). Lanes: 1, cell extract (soluble fraction); 2, DEAE fraction (160 to 225 mM KCl pool); 3, Superdex 200 gel filtration fraction. A molecular mass standard is shown on the left. The purified enzyme consisted of three subunits of 85, 75, and 20 kDa, respectively.
