<p>Shown are transcripts W, X and Y (assembled from multiple RNA-seq reads) and transcript Z (hypothetical transcript) mapped onto the partial <i>cox1</i> region of Placozoa sp. H2 “Panama”. Exon/intron color codes as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0177959#pone.0177959.g001" target="_blank">Fig 1</a>. The superscript 1 indicates differences in the <i>cox1</i> annotation compared to Burger <i>et al</i>., 2009 (see text). Continuous reads/transcripts are indicated by yellow and black connector lines, respectively. The upper transcripts (W) and (X) represent intermediate splicing stages and transcripts from both directions overlap at the micro exon “C” (marked in yellow). Transcript (Y) represents the <i>cox1</i> mature mRNA sequence (in agreement with EST data from <i>Trichoplax adhaerens</i>). Transcript (Z) represents a hypothetical pre-mRNA-editing transcript (following Burger <i>et al</i>., 2009) which has not been found in our RNA-seq data. The putative mRNA editing site in transcript (Z) is indicated by a red “T”. The <i>Trichoplax adhaerens</i> cDNA read supporting the micro exon as well as the intron 7<sup>1</sup> splice sites is illustrated at the bottom.</p
