Location and expression of potential regulatory RNAs. Transcript abundances, based on cDNA reads, from regions proposed to function as (A) a fluoride-sensing riboswitch upstream of TK0513  and (B) a pre-Q1 riboswitch designated sRk28. (C) Transcripts of sscA [24, 57] present in the 5'-UTR of TK0308. (D) Transcripts of tRNALys (Tkt03) present within the 5'-UTR of TK0306. An antisense RNA is also transcribed from the TK0306 region. The numbers of cDNA reads from transcripts present in T. kodakarensis cells growing exponentially with sulfur (Sexp; blue) and in stationary phase in sulfur medium (Sstat; red), growing exponentially in pyruvate medium before (Pexp; green) and 20 min after sulfur addition (PS; orange) are given by the peak heights. Data from the control library (C; exponential phase with sulfur) not digested with TEX are shown in grey. The relative abundance scales on the right of each panel allow direct comparisons of all data in that panel. The black scale bar in the top right corner of each panel is corresponds to 100 nt.