A New Exon Derived from a Mammalian Apparent LTR Retrotransposon of the SUPT16H Gene

Figure 5

Comparison of structure between MaLR-derived transcript (BX333035) and new alternative transcript. Both MaLR-derived transcript and new alternative transcript have a cassette exon derived from the MaLR in the intron of SUPT16H. The MaLR could be exonized by the acceptor site (AG) in its sequence. One difference between the 2 transcripts is the length of the cassette exon. The new alternative transcript has an alternative exon derived from the MaLR only because the MaLR has not only an acceptor site but also a donor site (GT). However, the MaLR-derived transcript has an elongated cassette exon that was formed by combining the new exon and the original exon.