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Western blot analysis of HreP processing products. Proteins were prepared as described in the legend for Fig. 4. −, uninduced cells ER2566 (pET-P8/P4-3); +, IPTG-induced cells ER2566 (pET-P8/P4-3); 1, purified HreP; 2; purified HreP proprotein (aa 1 to 184); M, molecular mass standard (in kilodaltons).
