Occurrence of Retrotransposons in Centromere- and Knob-Repeat Containing BACs[i]
| Centromeric BACs | Knob BACs | ||
| Additional repeats[ii] | Number of BACs | Additional repeats[ii] | Number of BACs |
| H | 1 | P2, P1, Z, A | 1 |
| H, G | 8 | H, P2, O, G, P1 | 1 |
| H, G, O | 11 | H, P2, O, G, P1, Z | 1 |
| H, G, O, Z | 1 | H, P2, G, P1, Z, A | 1 |
| H, G, O, A | 1 | None | 1 |