FIG 4 .

WhiA and WhiB targets depend on both whiA and whiB for their expression. Data represent results of microarray transcriptional profiling for 12 selected WhiA and WhiB target genes (ftsW, ftsZ, filP, whiG, sven1406, sven5313, sven3535, sven4724, sven1324, sven4756, sven6616, and sven3229) during submerged sporulation in wild-type S. venezuelae (blue diamonds); the congenic whiA mutant, SV11 (red circles); and the congenic whiB mutant, SV7 (green triangles). In each panel, the x axis indicates the age of the culture in hours, and the y axis indicates the per-gene normalized transcript abundance (log₂). For the wild type, 10 to 14 h corresponds to vegetative growth, 14 to 16 h corresponds to the onset of sporulation (fragmentation), and 16 h and beyond corresponds to sporulation. The arrangement of the 12 panels mirrors that in Fig. 3.