319757.fig.0012
Figure 12: Model of the proposed structure for the S,N macrochelate cis-[Pt(NH3)2{d(GsT)}-S,T-N3]2+ formed from the reaction of [Pt(NH3)2I2] with R,S-d(GsT), IVs, in which the 3′-residue, T2, is orientated syn with respect to the DNA sugar ring to which it is attached to allow presentation of N3 for binding to Pt.