FIG. 4.

Effect of 3′ deletions on Ω4406 expression. Developmental expression from DNA segments spanning from bp −100 to 485 (▪) (i.e., the 0.6-kb segment; the data shown in Fig. 1 is also shown here), bp −100 to 251 (▴), or bp −100 to 50 (⧫) relative to the Ω4406 transcriptional start site, fused to lacZ and integrated at the Mx8 phage attachment site in the chromosome of M. xanthus wild-type DK1622, was measured for three independently isolated transformants (see Materials and Methods). The meaning of points and error bars is the same as described in the Fig. 1 legend. The error bars are too small to be seen for the bp −100 to 50 segment.