...MLT1 and MLT2 represent the ancestral mammalian LTR subgroups, and theMT, ORR1, andMT2 subgroups radiated during rodent
evolution (Fig. 1A–C; Supplemental Fig. S1B). Sequence analysis also showed that, except for MT2, ERVL LTRs are depleted of
CpG dinucleotides, suggesting that MT2 LTRs evolved...