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Regulatable EGFP expression from hTERT-BMSCs/Tet-on/GAL cells in the presence and absence of Dox in vitro (×400). hTERT-BMSCs transfected with LV.TetIIP-GAL-EGFP-/Ubi-TetR showed strong green fluorescence after treatment with 1 μg/mL Dox for 48 h (a), whereas very faint fluorescence was observed without Dox induction (b). Scale bar: 200 μm.
