Figure 3.

Schematic illustration of the different classes of genomic contexts of sRNAs. Genes are depicted as thick arrows with open reading frames (ORFs) shown in gray and sRNAs shown in red. Only a subset of all possible direction of transcription combinations are shown. Antisense RNAs (asRNAs) are within an ORF that is transcribed on the strand opposite to the asRNAs. Sense sRNAs are within an ORF that is transcribed on the same strand as the sRNA. Intergenic sRNAs are found in intergenic regions (IGRs) between ORFs. Partial overlapping sRNAs occur when the 5′ or 3′ end of the sRNA overlaps with the 5′ or 3′ end of an ORF. Partial overlapping on both ends sRNAs occur when the 5′ of the sRNA overlaps the 5′ or 3′ end of an ORF and the 3′ of the sRNA with the 5′ or 3′ end of another ORF.