FIGURE 2.
Determination of different heavy-metal resistance mechanisms in the mutant strains. (A) Resistance of mutant strains to Cd2+. (B) Resistance of mutant strains to Cu2+ (CuCl2). (C) Resistance of mutant strains to Zn2+ (ZnSO4). (D) Resistance of mutant strains to Ni2+ (NiSO4).