Lim, S.Kortschak, R.Adelson, D.2018-08-242018-08-242014Animal Genetics, 2014; 45(3):367-3720268-91461365-2052http://hdl.handle.net/2440/113886Long terminal repeat (LTR) retrotransposons are transposable elements flanked by 5'/3' LTRs. They have a structure similar to endogenous retroviruses, but they lack the envelope (env) gene making them non-infectious. Long terminal repeats are motif-rich sequences and can act as bidirectional promoters or enhancers to regulate or inactivate genes by insertion. In this study, we identified a new chimeric LTR subfamily, LTR2i_SS, in the pig genome. This chimeric LTR family appears to be the ancestral form of the previously described LTR2_SS family. LTR2_SS appears to have deleted ~300 bp of un-annotated, ancestral sequence from LTR2i_SS. We identified no functional provirus sequences for either of these LTR types. LTR2i_SS sequences have been exapted into the untranslated regions of two protein-coding gene mRNAs. Both of these genes lie within previously mapped pig quantitative trait loci.en© 2014 Stichting International Foundation for Animal GeneticsExaptation; long terminal repeat; repetitive elements; retrotransposon; retrovirusJournal article003000883710.1111/age.121380003339977000072-s2.0-8489884386778865Kortschak, R. [0000-0001-8295-2301]Adelson, D. [0000-0003-2404-5636]