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Fig. 2. Map of the genomic 5' UTR of regA. Grey boxes
symbolize exons, and the lines between them represent introns. The locations
of the upstream ATGs (ATG1-ATG8) and of the functional start codon (ATG9) are
indicated. The transcription start (+1) is marked by a bent arrow. The
expanded portions below show the ATG1, ATG2 and ATG7 open reading frames
(light grey boxes); the black bars indicate the potential bipartite take-off
(E1.1 and E1.2) and landing (E3) sites, the location of the triple-hairpin
structure (HPS, lower bar), the region deleted in the 
S18 construct,
and the point where the artificial hairpin (hp) shown in
Fig. 6 was inserted.
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