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Characterization of two sets of U-2 OS clones. (A) The levels of GR isoforms were comparable in each set of clones. (B) GR isoform-selective killing of U-2 OS cells by DEX (100 nM, 48 h) was observed in both sets of clones. The first set of clones was extensively examined, as shown in the other figures. *, significantly higher than GRα; **, significantly lower than GRα.
