Fig. 3.
Coexpression enhances the stability of full-length human JunB expressed in E. coli. Bacterial lysate and sonication supernatant taken from individually expressed F:JunB or coexpressed F:JunB/6His:c-Fos were separated by 10% SDS-PAGE and analyzed by Western blotting with anti-FLAG M2 monoclonal antibody. Lanes 1 and 2, F:JunB expressed from a monocistronic plasmid, pF:JunB-11d, which carries the coding sequence of FLAG-tagged human JunB. Lanes 3 and 4, full-length F:JunB stabilized by coexpressed 6His:c-Fos.