Table 3.
Causes of Incorrect Orthology Assignments by Two-Way BLAST
| Reason | 2 segments | Gap penalties | Constant molecular clock | No rooting with outgroup | Total |
| False negatives | 2 | 4 | 0 | 0 | 6 |
| False positives | 3 | 4 | 5 | 5 | 17 |
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See text for details.











