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Hypermutation in chromosomal TetR stationary-phase mutants
| rec genotype* | No. of Mal− and Xyl− mutants among TetR mutants, mutant colonies/colonies scored† |
|---|---|
| rec+ | 18/869 |
| recD | 27/1,304 |
| recG | 58/950 |
Strains are SMR4576, SMR4721, and SMR4733.
Mal− and Xyl− mutations are loss-of-function mutations in the chromosomal maltose and xylose regulons, conferring inability to ferment these sugars.
