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GM induces lung cancer cell apoptosis. A549 cell apoptosis was (A) detected by performing TUNEL assays and (B) quantified (n=3). (C) Expression levels of apoptosis-related proteins were detected via western blotting (n=3). *P<0.05, **P<0.001 and ***P<0.001 vs. control. GM, germacrone; C, cleaved; PARP, poly(ADP-ribose) polymerase.
