Formation Equilibria and Thermodynamic Stability of Multinuclear Chelates of Amino Acid and Pyrimidine Base Involving Some Bio-Active Transition Metal Ions: Figure 1

Figure 1: Potentiometric titration curves of 1:1:1:1 Cu(II)-Co(II)-valine-uracil system; (A) acid, (B) valine, (C) Cu(II)-valine, (D) Cu(II)-valine-uracil and (E) Cu(II)-Co(II)-valine-uracil.