Fig 2. A complete list of genomic mutations distinguishing derived phenotypes from their ancestors.

The positions of mutations are indicated for regions of the genome in which mutations have been shown to be sufficient to confer the derived phenotype. (A) Mutations distinguishing first-order resistant B₁ bacteria from the sensitive B₀ ancestor. (B) Mutations distinguishing host-range mutant T3₁ phage from the wild-type T3₀ ancestor. (C) Mutations distinguishing second-order resistant B₂ bacteria from the B₀ ancestor. The “waa” prefix has been omitted from LPS biosynthesis genes to conserve space. The white area indicates a deletion that spans several genes. Detailed information about each mutation is provided in S1–S3 Tables.