RT Journal Article SR Electronic T1 Interactions of the Antibiotic Distamycin A with Homopolymeric Single-Stranded Polydeoxyribonucleotides and with ΦX 174 Deoxyribonucleic Acid JF Molecular Pharmacology JO Mol Pharmacol FD American Society for Pharmacology and Experimental Therapeutics SP 185 OP 190 VO 12 IS 1 A1 ANNE K. KREY A1 JOHN G. OLENICK A1 FRED E. HAHN YR 1976 UL http://molpharm.aspetjournals.org/content/12/1/185.abstract AB The absorption spectrum of distamycin A was changed by poly dA, poly dT, poly dG, and poly dC and also by ΦX 174 DNA. Poly dA and, to a lesser extent, poly dG induced a Cotton effect in the optical rotatory dispersion spectrum of distamycin A. The complex of distamycin A and ΦX 174 DNA showed a reverisble cooperative transition upon heating and cooling. Distamycin A inhibited the template activities of poly dA and poly dT in an RNA polymerase reaction in vitro.