a) Western blot analysis of PUMA in H1299 cells treated with DMSO, monomer 2 (20 μM) or dimer 1 (3, 5 and 10 μM) for 24 hrs. b) RNA was harvested 8 and 24 hrs, respectively, after treatment with DMSO, monomer 2 (20 μM), or dimer 1 (3 and 10 μM). PUMA expression was analyzed by qRT-PCR. Expression was normalized to 18S levels and is reported as x-fold increase over untreated control.