X-ray Structure of the Major Adduct of the Anticancer Drug Cisplatin with DNA: cis-[Pt(NH3)2{d(pGpG)}]

See the following publication for details about the chemistry behind this wonderful molecule:
Suzanne E. Sherman, Dan Gibson, Andrew H.-J. Wang, Stephen J. Lippard, Science 25 October 1985: Vol. 230 no. 4724 pp. 412-417. DOI: 10.1126/science.4048939