| Species | Reference taxon | Paralog acquisition or displacement (number and % in genome) | Acquisition of a new gene (number and % in genome) |
|---|---|---|---|
| Mycoplasma genitalium | Firmicutes | 6 (1.2) | 2 (0.4) |
| Mycoplasma pneumoniae | Firmicutes | 9 (0.9) | 8 (1.2) |
| Bacillus subtilis | Firmicutes | 685 (16.7) | 383 (9.3) |
| Bacillus halodurans | Firmicutes | 772 (19.0) | 400 (9.8) |
| Treponema pallidum | Spirochaetales | 132 (12.8) | 204 (19.8) |
| Borrelia burgdorferi | Spirochaetales | 109 (12.8) | 141 (16.6) |
| Haemophilus influenzae | Proteobacteria | 32 (1.9) | 21 (1.2) |
| Rickettsia prowazekii | Proteobacteria | 49 (5.9) | 32 (3.8) |
| Escherichia coli | Proteobacteria | 223 (5.2) | 102 (2.4) |
| Pseudomonas aeruginosa | Proteobacteria | 448 (8.1) | 275 (5.0) |
| Neisseria meningitidis | Proteobacteria | 55 (2.7) | 34 (1.7) |
| Vibrio cholerae | Proteobacteria | 130 (3.4) | 85 (2.2) |
| Xylella fastidiosa | Proteobacteria | 88 (3.2) | 83 (3.0) |
| Buchnera sp. | Proteobacteria | 0 (0.0) | 0 (0.0) |
| Mycoplasma genitalium | Mycoplasma | 0 (0.0) | 0 (0.0) |
| Chlamydia pneumoniae | Chlamydiales | 4 (0.4) | 25 (2.4) |
The schema for detection of candidate horizontal transfers was the same as in Table 3.
From: Horizontal Gene Transfer in Prokaryotes: Quantification and Classification
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