Notes: The percentages are fractions of introns with the selected repeats over all introns in the listed species and only those greater than 10% are showed in the table. The species codes are: 1, human; 2, orangutan; 3, macaque; 4, cow; 5, panda; 6, horse; 7, elephant; 8, mouse; 9, rat; 10, guinea pig; 11, opossum; 12, platypus; 13, chicken; 14, anole; 15, frog; and 16, zebrafish.