To elucidate further sequence selectivity and nature of the binding of anticancer drugs to DNA,the interaction between anticancer drugs,which are minor groove ligands(distamycin A,DM and netropsin,NP) and intercalator(mitoxantrone,MT),and DNA were studied by electrospray ionization mass spectrometry.The 2∶1 specific complex of DM and AT-rich DNA were observed principally,while only(1∶1) specific complex of NP and AT-rich DNA were observed.MT specifically binds to GC-rich DNA.In addition,DM binds to DNA cont...