Fig. 1.

RNAseq data from human and chimpanzee liver samples are plotted along the Vanin-family protein 3 (VNN3) gene region. The human gene structure is provided below each plot and indicates that there are seven annotated exons in this genes (there is no independent annotation of the chimpanzee genome). The arrows indicate a cluster of sequencing reads that does not correspond to any part of the human gene model. A de novo definition of transcriptional units clearly classifies this as an additional exon. Arguably, there is yet another unannotated exon at the 5′ end of the region.