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Up-regulation of endogenous genes in BGC-823 cells treated with TGF-β1. RT-PCR products were electrophoresed on 1.5% agarose gel containing ethidium bromide. The level of β-actin was used as an internal control. M: DL2000 marker; N: the basal level; lanes 1, 2 and 3: 1-, 2- and 3-h exposure to TGF-β1, respectively.
