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4‐[5‐(4‐methyl‐1‐piperazinyl)‐2‐benzimidazolyl]‐2‐benzimidazolyl phenol (Hoechst 33258) or its ethyl ether (Hoechst 33342); a substance that is useful as a DNA‐binding fluorochrome for staining chromosomes within cell nuclei. It is believed to be specific for A‐T base pairs.


Subjects: Chemistry.

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