Abstract
A novel fluorescence procedure has been used to study the binding characteristics of DNA with three modern fluorochromes currently used in chromosome cytochemistry. The transient changes in the polarised components of fluorescence have been recorded for dye-tagged DNA solutions when subjected to short duration electric pulses. From these data, it has been inferred that, like ethidium bromide, berberine sulphate and quinacrine mustard both intercalate the DNA structure whilst the bi-benzimidazole derivative Hoechst 33258 binds with a distinctively different geometry, probably within the helical grooves.
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Jennings, B.R., Ridler, P.J. Interaction of chromosomal stains with DNA. Biophys. Struct. Mechanism 10, 71–79 (1983). https://doi.org/10.1007/BF00535543
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DOI: https://doi.org/10.1007/BF00535543