Figure 1.
Schematic representation of the different modes of action of bioactive cobalt complexes. Three classes of cobalt complexes are discussed: 1) complexes that directly act on biomolecules through ligand exchange, 2) complexes that modify the activity of ligated drugs and 3) complexes that are activated by bioreduction to either (I) yield a cobalt effector species or (II) release a small molecule drug.