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. 2020 Oct 21;11:584893. doi: 10.3389/fmicb.2020.584893

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Copyright © 2020 Hess, Paul, Puniya, van der Giezen, Shaw, Edwards and Fliegerová.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Topology of the ribosomal RNA (rrn) operon. Genes of the small (SSU; 18S), large (LSU; 28S) and 5.8S subunit, internal transcribed spacer 1 (ITS1) and 2 (ITS2), flanked by the external transcribed spacer (ETS) regions and linked by the intergenic spacer (IGS).