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Changes in cell morphology following DAPT discontinuation. Cells cultured in medium containing DAPT show a stem‐like morphology (A). DAPT removal from culturing medium leads to morphological changes compatible with senescence (B). Scale bar: 100 μm. Abbreviations: DAPT: N‐[N‐(3, 5‐difluorophenacetyl)‐l‐alanyl]‐S‐phenylglycine t‐butyl ester
