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. 2013 Jan 3;9(1):e1003156. doi: 10.1371/journal.pgen.1003156

Figure 1. GcvB negatively regulates phoP expression at the post-transcriptional level.

Figure 1

(A) Specific ß-galactosidase activity of strain MG1425 transformed with an sRNA dedicated-plasmid library. Activity of the strain transformed with the vector control was arbitrarily set at 100%. Plasmid pIS118, overexpressing the IS118 sRNA, was not included in this experiment, but it did not affect expression of Ptet-phoP-lacZ fusion by more than 2-fold (data not shown). (B) Specific ß-galactosidase activity of strain MG1511 transformed with plasmids overexpressing GcvB or SgrS, or with the pBRplac empty vector. (C) Specific ß-galactosidase activity of strains MG1511 (gcvB+) and MG1521 (gcvB−).