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(A) Terminal Restriction Fragment analysis by Southern blotting in parental (P) HeLa, BRC-230, AKG, GK2, and GM847 cell lines and in their clones (numbers on top). Average TRF length is shown at the bottom. (B) TERRA expression detection by northern blotting in the same parental cell lines and in the clones. Ethidium bromide-stained 18S rRNA bands (bottom) were used as loading control.
