The interaction of daunomycin with B and Z helices of a self-complementary DNA fragment d(CGm5CGCG) in solution was studied by 1H-NMR spectroscopy at 500 MHz. The results show that the B-Z transition kinetics is not affected by addition of daunomycin. Daunomycin binds exclusively to the B form of d(CGm5CGCG). Z exchanges with B while the latter also exchanges with the B duplex-daunomycin complexes.
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Neumann et al. (1985) studied this question.
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