SINEs of the perfect character.
Hillis
D M
DM
D000818:Animals; D001188:Artiodactyla / Q000145:classification / Q000235:genetics; D002591:Cetacea / Q000145:classification / Q000235:genetics; D019143:Evolution, Molecular; D020071:Interspersed Repetitive Sequences; D008322:Mammals / Q000145:classification* / Q000235:genetics*; D010802:Phylogeny