Fig. 1

Schematic of the gene structure of Mnemiopsis leidyi FPL. Thick bars represent coding sequences while thin bars represent untranslated exon regions in the gene models. The final gene model in the ML2.2 release was taken from the FGENESH gene model MLRB181735, while instead MLRB181734 most accurately depicts the putative structure of the M. leidyi FPL gene. Trinity transcripts comp18438_c0_seq1 and comp18438_c0_seq2 overlap for 24 bp in the middle, despite going different directions. The cufflinks transcript ML1817_cuf_24 extends downstream for almost 20 kbp before finishing at an incorrectly positioned 28 bp exon. The unfiltered gene model MLRB181733 (not shown for clarity) extends for thousands of bases in both directions, bridging several other genes, and is likely to be an artifact