From: U12 intron positions are more strongly conserved between animals and plants than U2 intron positions
 | U2 intron positions | U12 intron positions | P Fisher | ||
---|---|---|---|---|---|
 | Shared | Variable | Shared | Variable |  |
#conserved positions (U2–U12 mixed cases removed) | 115 | 1371 | 20 | 115 | 0.008 |
#conserved positions, U2–U12 mixed cases are counted as variable introns | 115 | 1391 | 20 | 135 | 0.003 |