FIG. 1.

Schematic diagram of the conserved regions of ς³² and the location of the mutations studied in this report. The allele number of each mutation is listed in parentheses below the amino acid changes of the mutants. The regions are separated according to amino acid sequence similarity (9, 12, 22). The RpoH box is a conserved region only found among heat shock homologs (26). The conserved residues, according to the alignment analysis of Lonetto et al. (22), are depicted in boldface.