FIG. 6.

Growth-dependent analysis of smeDEF expression in the S. maltophilia D457 strain. Due to the low level of smeDEF transcripts observed for the S. maltophilia D457 strain in previous experiments (Fig. 3), a new Northern blot analysis of samples obtained throughout the growth curves of both the D457 and D457R strains (Fig. 3A) was performed as described in the text. The growth-phase regulation of the amount of smeDEF RNA in the wild type was similar to that in the MDR mutant.