Abstract
A proton-magnetic-resonance study of the complex formed between actinomycin D and 10,11-dihydro-3H-naphth[1,2-g]indazol-7-ol strongly suggests that the indazole lies above the phenoxazine ring of actinomycin D. The complex can be destroyed by addition of dimethyl sulphoxide or dimethylformamide. The actinomycin D-indazole complex inhibits growth of Pseudomonas fluorescens and raises the thermal denaturation response of DNA. These data support the hypothesis that a molecular complex is formed which readily inhibits cell growth and interacts with DNA.
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