What is internal transcribed spacer?

Internal transcribed spacer(ITS) is the spacer DNAsituated between the small-subunit ribosomal RNA(rRNA) and large-subunit rRNA genesin the chromosomeor the corresponding transcribedregion in the polycistronicrRNA precursor transcript. ITS across life domains[edit]

Should internal transcribed spacer be incorporated into the core barcode?

PLoS One 6, e16931 (2011). D-Z Li, et al., Comparative analysis of a large dataset indicates that internal transcribed spacer (ITS) should be incorporated into the core barcode for seed plants. Proc Natl Acad Sci USA 108, 19641–19646 (2011).

Which ribosomal cluster contains a 5' external transcribed spacer?

Each eukaryotic ribosomal cluster contains the 5' external transcribed spacer(5' ETS), the 18S rRNAgene, the ITS1, the 5.8S rRNAgene, the ITS2, the 26S or 28S rRNAgene, and finally the 3' ETS. During rRNA maturation, ETS and ITS pieces are excised.