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Distribution of conserved and mixed positions of U12 and U2 introns in human and Arabidopsis orthologs.
| Position | ||||
| Type | Number of introns | 5' | 3' | P-valuea |
| Human U2/Arabidopsis U2 | 230 | 136 | 94 | 0.006734 |
| Human U12/Arabidopsis U12 | 40 | 31 | 9 | 0.0006795 |
| Human U12/Arabidopsis U2 | 30 | 9 | 21 | 0.04277 |
| Human U2/Arabidopsis U12 | 10 | 6 | 4 | 0.7539 |
aCalculated using two-sided binomial test with prior probability 0.5 and the number of introns in the 5' half of a gene treated as the number of successes.
