Table 2. Types and positions of spontaneous mutations in the pyrF and pyrE2 genes.
| Gene position (bp) | Number of independent isolates with this mutation | Type of mutation(1) |
| pyrF | ||
| 354 | 4 | Insertion (C) |
| 356 | 4 | Insertion (C) |
| 357 | 4 | Insertion (A) |
| 359 | 4 | Insertion (CG) |
| 360 | 1 | Insertion (A) |
| 361 | 4 | G→C(2) |
| 362 | 4 | Insertion (TC) |
| 365 | 4 | Insertion (G) |
| 397 | 8 | G→T(2) |
| 463 | 1 | C→A(2) |
| 798 | 3 | Insertion (C) |
| pyrE2 | ||
| 382 | 42 | Deletion (GTCGACG) |
| 390 | 42 | C→T |
| 392 | 42 | Deletion (T) |
| 394 | 42 | C→G(2) |
| 397 | 42 | Deletion (G) |
(1)
insertion indicated was found prior to the stated base pair position.
(2)
non-synonymous base pair changes.