The NucView® caspase-3 substrates are activity-dependent i.e. require active caspase-3 enzyme. In dead, fixed and preserved cells or tissue sections, there are no active caspases and hence these substrates cannot be used. We also offer TUNEL assay kits that are suitable for apoptosis detection in fixed cells and tissues. The kits employ dUTPs conjugated to our exceptionally bright and photostable CF® dyes for single-step fluorescent TUNEL labeling of DNA strand breaks, a hallmark of apoptotic cells, and are suitable for analysis by fluorescence microscopy or flow cytometry.
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