Telomere‐specific FISH in HCC cell lines. Representative FISH images of (A) MHCC‐97 L, MHCC‐97H, and HCC‐LM3; (B) Huh7 and SMMC‐7721; and (C) L‐02 and Hela cells. Left panels: 4',6‐diamidino‐2‐phenylindole (DAPI) (blue) was used to identify nuclei. Middle panels: Cy3‐PNA telomere‐probe fluorescence. Right panels: merged images (original magnification ×40). (D) Statistics of FISH telomere signal intensity.