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Effects of P-A, PPT and ATRA on the morphology of MKN-45 and BGC-823 cells. Cells were incubated with 1% DMSO, P-A (0.5 μM), PPT (0.05 μM) or ATRA (100 μM) for 24 h. Subsequently, cells were stained with Hoechst 33342 for microscopy. Magnification, ×200; scale, 20 μm.
