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Absence of zinc staining in the nucleus. Images of HeLa co-labeled with Zinpyr-1 and Syto Red 64, a live cell marker for the nucleus. HeLa cells were stained with 10 mM Zinpyr-1 for 10 min at 37°C, and then stained with 2.5 mM SYTO Red 64 for 10 min at 37°C. Scale bars indicate 10 µm.
