Figure 1

Extensive sense and antisense nc-rRNA transcripts within the rDNA locus. The gel lanes show amplified transcripts by RT-PCR and their locations in the rRNA are identified by their 5′-terminal nucleotides. Those lanes labeled with underlined nucleotide identifiers, also presented as dotted lines in the bottom figure, represent regions that cannot be determined because amplification was unsuccessful even from DNA template. NTS, nontranscribed spacer; ETS, external transcribed spacer; ITS, internal transcribed spacer. See Supplementary Table 1 for the corresponding nucleotide locations