Identification of the transcriptional start sites of the rpoS
gene in V. vulnificus. A, primer extension experiment
using V. vulnificus RNA and the oligonucleotide primer PE+83
(annealing to the region from +54 to +83 relative to the IC of rpoS).
Lanes C, T, A, and G represent the nucleotide sequencing
ladders of pINE32. The asterisk indicates the site of transcriptional
initiation for rpoS. B, primer extension experiment using the
oligonucleotide primer PE-368 (annealing to the region from –368 to
–339 relative to IC) as described above. C, two rpoS
promoters in the nlpD open reading frame and nlpD-rpoS
intergenic space. The promoter Pp is proximal to the IC of
rpoS, and the promoter Pd is distal from the IC of
rpoS. The promoters, –10 and –35 regions, are
underlined, whereas the stop codon of nlpD and the start
codon of rpoS are capitalized.