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// Workers AI · dad joke modeWhy was External Transcribed Spacer sad? It was spaced out.

From Wikipedia, the free encyclopedia
Organization of the eukaryotic nuclear ribosomal DNA tandem repeats.

External transcribed spacer (ETS) refers to a piece of non-functional RNA, closely related to the internal transcribed spacer, which is situated outside structural ribosomal RNAs (rRNA) on a common precursor transcript.[1] ETS sequences characteristic to an organism can be used to trace its phylogeny.[2]

References

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  1. Schibler, U.; Wyler, T.; Hagenbuchle, O. (1975). "Changes in size and secondary structure of the ribosomal transcription unit during vertebrate evolution". Journal of Molecular Biology. 94 (3): 503–17. doi:10.1016/0022-2836(75)90217-X. PMID 809590.
  2. Baldwin, B. G.; Markos, S. (1998). "Phylogenetic utility of the external transcribed spacer (ETS) of 18S-26S rDNA: Congruence of ETS and ITS trees of Calycadenia (Compositae)". Molecular Phylogenetics and Evolution. 10 (3): 449–63. doi:10.1006/mpev.1998.0545. PMID 10051397.