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Telomere length analysis of fibroblasts treated with TERT mRNA. Representative images of metaphase spreads in which yellow represents the signal from the telomere probe and blue is DAPI. Telomere lengths for each population are shown as frequency distributions of telomere signal intensities. Median telomere signal intensities are indicated as vertical dashed blue lines. The arrow indicates the portion of the bimodal distribution corresponding to shorter telomeres.
