Fig. 4. M2+-dependent CmΔZntA ATPase activity in proteoliposomes. (a) Pb2+-dependent, (b) Zn2+-dependent (c) Cd2+-dependent and (d) Hg2+-dependent specific ATPase activity as a function of metal concentrations (0–100 μM). Data were fitted with a Michaelis–Menten-like equation as described in Materials and methods. All the ATPase activity measurements were corrected for background values for control liposomes and all data are mean ± s.d. (n = 3).
