Figure 7.

Deletion analysis spanning the -35 and -10 regions of genes 14 and 19. β-galactosidase activity of extracts prepared from E. coli cultures of bacteria transformed with -35 or -10 deletions or deletions spanning from -35 to 10 were determined. Panels A and C have cartoons depicting deletion constructs and their orientations for genes 14 and 19, respectively. Panels B and D contained the β-galactosidase activity analysis data. Data are presented with SD values calculated from four independent experiments (P ≤ 0.001).