FIG. 1.

Genetic organization of the spoIIIJ-jag locus of B. subtilis. A partial restriction map and the genetic organization of the spoIIIJ region are shown. The boxes below the line representing a partial restriction map of the region indicate the extents of the different cistrons in the region (30), all of which are transcribed from left to right. The stem-and-loop structures upstream of rpnA and downstream of jag indicate the position of possible transcription terminators. The position of the spoIIIJ promoter is shown by a horizontal arrow. The position of the mutation present in the spoIIIJ87 allele (L138STOP) is indicated. The lines below the restriction map represent DNA fragments present in the indicated plasmids.