Figure 2From: Expression of the pstS gene of Streptomyces lividansis regulated by the carbon source and is partially independent of the PhoP regulatorWestern and Northern analyses of PstS expression. A) Western blot to detect cell-bound PstS in S. lividans TK24 grown under the indicated conditions (B, basal; G, basal + 5% glucose, F, basal + 5% fructose) and times (48, 60 hours). 20 μg of total protein were loaded per lane. B) Northern analysis of pstS expression in the above cultures. 16S RNA was used as a loading control (lower part). C) Transcriptional analysis of the pstS operon genes in the presence of 5% fructose at the indicated times (48, 60 hours). The bands detected are indicated at the right. 16S RNA was used as a loading control (lower part). D) Schematic representation of the pst operon and surrounding genes. A putative transcriptional terminator is proposed between pstS and pstC. The sizes of the RNA bands obtained in the Northern are indicated.Back to article page