FIG 1.
3′-RACE of P1-tfoY transcripts. (A) This map shows the four transcriptional start sites identified for tfoY transcripts and their location on the V. cholerae chromosome. Numbering is relative to the start of the tfoY coding sequence. The locations of the sRNAs identified in this study are indicated below the map. The box with “term” indicates the location of the factor-independent termination discussed in the text. (B) Numbering of the x axis corresponds to the genomic map in panel A, except for position zero, which is included here for reference but does not represent a nucleotide position on the genome. The y axis indicates the number of P1-tfoY transcript sequences recovered whose 3′ end mapped to the position indicated. Asterisks indicate sites where sequences contained 3′-end tails with extragenomic nucleotides. Sixty-six sequences are depicted in total.