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. 2019 Aug 2;19:162. doi: 10.1186/s12862-019-1488-y

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Base pairing within long cis-spliced introns in diplomonads and a parabasalid. Secondary structural predictions of representative cis-spliceosomal introns from S. vortens (a), G. lamblia (b), and T. vaginalis (c) are shown with putative 5′/3′ splice site (SS) and branch point (BP) motifs underlined. Lengths of ‘single-stranded’ distances between splice donor and acceptor sites are indicated in nucleotides (nt) above the intron sequences