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A new tetrafunctional dinuclear platinum complex trans,trans-[{PtCl 2 (NH 3 )} 2 (piperazine)] with sterically rigid linking group was designed, synthesized and characterized. In this novel molecule, the DNA-binding features of two classes of the platinum compounds with proven antitumor activity are combined, namely trans oriented bifunctional mononuclear platinum complexes...
Thermal denaturation of calf thymus DNA modified by antitumor cis-diamminedichloroplatinum(II) (cis-DDP) and by two related Pt(II) compounds which had been shown to be clinically ineffective, viz. trans-diamminedichloroplatinum(II) (trans-DDP) or monodentate diethylenetriaminechloroplatinum(II) chloride {[Pt(dien)Cl)]Cl}, was studied by monitoring changes of absorbance at 260 nm. The melting of DNA...
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