TABLE 7.
Substitutions in ORFs divided into synonymous substitutions and nonsynonymous substitutionsa
| Type of substitution | No. of substitutions |
No. of transitions | No. of transversions | Transition/transversion ratio | |||||
|---|---|---|---|---|---|---|---|---|---|
| A-G | T-C | A-C | G-C | T-G | A-T | ||||
| Synonymous | 564 | 706 | 94 | 77 | 51 | 62 | 1,270 | 284 | 4.47 |
| Nonsynonymous | 276 | 133 | 41 | 40 | 51 | 46 | 409 | 178 | 2.3 |
| Total | 840 | 839 | 135 | 117 | 102 | 108 | 1,679 | 462 | 3.63 |
a
The number of transitions and transversions and their ratios are also shown. Note that the ratio between transitions and transversions for synonymous substitutions is almost twice as high as that for nonsynonymous substitutions (and the normal transition/transversion ratio found for other organisms).