Table 2. The effect of adjacent intron phase on intron loss.
| Percent introns retained
|
||||
|---|---|---|---|---|
| Adjacent intron phase
|
||||
| Same | Different | P | ||
| Diptera | ||||
| Ph0 | 5′ | 14 (202) | 23 (188) | 0.99 |
| 3′ | 23 (202) | 16 (159) | 0.08 | |
| Ph1 | 5′ | 31 (35) | 13 (112) | 0.01 |
| 3′ | 43 (35) | 27 (128) | 0.06 | |
| Ph2 | 5′ | 25 (32) | 31 (123) | 0.81 |
| 3′ | 23 (32) | 32 (136) | 0.46 | |
| All | 5′ | 17 (269) | 22 (423) | 0.95 |
| 3′ | 27 (269) | 25 (423) | 0.29 | |
| C. elegans | ||||
| Ph0 | 5′ | 17 (139) | 22 (127) | 0.87 |
| 3′ | 22 (139) | 24 (106) | 0.65 | |
| Ph1 | 5′ | 19 (26) | 22 (69) | 0.70 |
| 3′ | 35 (26) | 32 (81) | 0.50 | |
| Ph2 | 5′ | 18 (22) | 17 (83) | 0.55 |
| 3′ | 36 (22) | 16 (92) | 0.04 | |
| All | 5′ | 18 (187) | 20 (279) | 0.92 |
| 3′ | 26 (187) | 24 (279) | 0.35 | |
| H. sapiens | ||||
| Ph0 | 5′ | 67 (24) | 80 (35) | 0.93 |
| 3′ | 75 (24) | 86 (21) | 0.90 | |
| Ph1 | 5′ | 100 (8) | 67 (9) | 0.12 |
| 3′ | 100 (8) | 87 (23) | 0.39 | |
| Ph2 | 5′ | 63 (8) | 85 (20) | 0.96 |
| 3′ | 88 (8) | 80 (20) | 0.55 | |
| All | 5′ | 73 (40) | 80 (64) | 0.86 |
| 3′ | 83 (40) | 84 (64) | 0.72 | |
| S. pombe | ||||
| Ph0 | 5′ | 4 (137) | 9 (122) | 0.96 |
| 3′ | 9 (137) | 10 (104) | 0.60 | |
| Ph1 | 5′ | 9 (23) | 11 (65) | 0.74 |
| 3′ | 4 (23) | 21 (81) | 0.99 | |
| Ph2 | 5′ | 5 (21) | 12 (84) | 0.93 |
| 3′ | 5 (21) | 23 (86) | 0.99 | |
| All | 5′ | 5 (181) | 10 (271) | 0.99 |
| 3′ | 8 (181) | 17 (271) | 1.00 | |
5′/3′, whether the effect of the upstream (5′) or downstream (3′) adjacent intron is being tested; same, adjacent intron is of the same phase; different, adjacent intron is of different phase. Sample sizes are given in parentheses. P values were calculated with a one-tailed Fisher's exact test.