Subfamily Distribution of Alu Elements With Long “A-Tails” Retrieved From the Human Genome Draft
| Alu subfamily | A-tail with ≥40 A | A-tail with ≥50 A | |||
| Total members | Percent (%) | Total members | Percent (%) | ||
| J | 74 | 7.2 | 7 | 5.6 | |
| S | 465 | 45.5 | 51 | 40.5 | |
| Y/Yc1 | 313 | 30.6 | 34 | 27.0 | |
| Ya5/Ya5a2 | 113 | 11.1 | 26 | 20.6 | |
| Yb8/Yb9 | 57 | 5.6 | 8 | 6.3 | |
| Total | 1022 | 100 | 126 | 100 | |