Table 3.
Observed and Expected Numbers of Symmetrical Class 1 Domains and Domain Families in Humans
| Comb. | Obs. | Exp. | P | |
| Domains (345) | 0–0 | 29 | 5.3 | <10−10 |
| 1–1 | 257 | 226.2 | <10−3 | |
| 2–2 | 2 | 1.4 | n.d. | |
|
288 | 233 | <10−7 | |
| Domain family (56) | 0–0 | 8.5 | 5.2 | 0.13 |
| 1–1 | 24.3 | 17.9 | 0.07 | |
| 2–2 | 0.2 | 0.8 | n.d. | |
|
33 | 23.8 | <0.05 |
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↵The total number of class 1 domains and families are indicated in parentheses. Summed symmetrical combinations are shown in boldface. The expected values were calculated based on the frequencies of flanking intron phases. Some P-values were not determined (n.d.) due to the low sample size.
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↵combination of flanking intron phases.
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↵Observed.
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↵Expected.
