FIG. 3.

Complementation of transcription of covR2. (A) Growth curves showing times of isolation of RNA (arrowheads). Filled circles represent JRS4, open triangles represent JRS948 (covR2), and filled squares represent JRS948/pJRS951 (covR2/covR⁺). (B and C) Hybridization of specific DNA probes to RNA was as described in the legend to Fig. 2B, except that 4 μg of RNA was used throughout and the DNA probe for speMF was internal to the coding region (Materials and Methods). The covR probe is restricted to the 204 bp at the 3′ end of the gene.