Figure 8
Effect of different divalent cations on ATPase activity of TraE, TraJ and TraK. TraE, TraJ and TraK are highly active in the presence of Mg2+ and Mn2+. TraJ and TraK also hydrolyze ATP in the presence of Co2+. However, Ca2+, Cu2+, Ni2+ and Zn2+ failed to efficiently activate the enzymes. ATPase activity is given in nmol inorganic phosphate generated per min and per mg of the respective protein. The values are mean of three independent measurements with standard deviation.