Fig. 3.

An example of INT391 locus suggesting Pegasoferae clade. (A) An electrophoretic profile of PCR products of locus INT391, in which L1 is present in horse, cat, and bat, but not other mammals. The larger size of the mouse PCR product is caused by species-specific insertions of another retrotransposon (database position chr19:55196706–55197619 in mm7). M, size markers (øX174/HincII digest). (B) An alignment of locus INT391 sequences. Thick and thin lines denote the L1 and the direct repeat sequences, respectively, that were generated during integration. The central region of the inserted L1 sequence is omitted.