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C/EBPα can transport an NLS-deficient C/EBPβ protein to the nucleus. Coexpression of wild-type C/EBPα or C/EBPα C →A with C/EBPβΔBR21 in HeLa cells. C/EBPβΔBR21 was expressed alone (panel 1) or with increasing amounts of wild-type C/EBPα (panels 2–3) or C/EBPα C →A (panels 4–6). The subcellular location of C/EBPβΔBR21was analyzed by Western blotting as described in Fig. 2. The upper band is a protein that cross-reacts with the antiserum.
