Paralogous endogenous retrovirus (ERV)-like elements are enriched on the X and Y Chromosomes. (A) Phylogenetic reconstruction of relationships between ERV-like elements identified within the domestic cat genome (labeled by chromosome and coordinates), cheetah (AJU), and tiger (PTI). The branches are color-coded based on their predicted chromosome of origin. (B) Ideogram of consensus of Y-linked ERV-like sequences annotated with vestigial ERV genes (below) and the promoter prediction score (above) by position within the sequence. Scores below 0.5 can be ignored, while those ranging from 0.5 to 0.8 are considered marginal and between 0.8 and 1.0 as moderately likely; any score above 1.0 is considered as highly likely. (C) Position of ERV-like sequences along the domestic cat X Chromosome.
