Figure 7
Plot of coordination number versus cation radius for commercially available divalent metal cations. Those cations that support Csk activity are shown in blue. Zn2+, which also binds to Csk but does not support Csk activity, is shown in red. Fe2+ and Cr2+ are also labelled. Their ability to support Csk activity is discussed in the text. The coordination numbers and the cation radii are taken from reference [28] and the inhibition data is taken from reference [8].