Table 1.
Results of Retrofitting BAC Clone 261M17
| Colonies (no.) | |||||
| Antibiotic selection | Cre+ | Cre− | |||
| (white) | (blue) | (white) | (blue) | ||
| Chloramphenicol | 960,000 | 0 | 184,000 | 0 | |
| Kanamycin | 280 | 20 | 0 | 10 | |
| Chloramphenicol and kanamycin | 230 | 0 | 0 | 0 | |











