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Activation of caspase-9 is necessary for the apoptosis due to its overexpression. The pituitary cells were grown in the presence of 2 μM z-LEHD.fmk, where appropriate (+z-LEHD.fmk), after the introduction of DNA for fluorescent fusion proteins. There are no statistically significant differences between the samples (P = 0.926, Kruskal-Wallis test). CytcE: cytochrome c-EGFP, Casp9E: caspase-9-EGFP. The thin line indicates the mean value.
