Coverage (a) and length (b) of six classes of transcripts identified by ORA in the S288c strain at 6 g/l. From left to right are reported: transcripts encoding proteins (prot. encod.), non-coding transcripts localized in antisense to other genes (mainly protein-encoding) (SAUT), non-coding transcripts localized in intergenic regions (SUT), tRNAs, other non-coding RNAs (mainly small nuclear RNAs) and ncRNAs localized in intronic regions. The number of transcripts identified for each class in the S288c strain at 6 g/l is shown in (a).