Figure 3
An example of a recent intron acquisition in a retrotransposon-derived gene: structure of two splice variants of RNF113B. The new intron of RNF113B is not a de novo insertion but rather a derivative of exonic sequences (this intron contains 59 nucleotides from the former coding sequence and 46 nucleotides from the 3’ UTR). A partial alignment of three RNF113B sequences and three RNF113A sequences is shown above the spliced RNF113B isoform. The donor splice site is marked in yellow, the predicted branch point signal is marked in blue, and the acceptor splice site is marked in gray. The data is from [101].