TABLE 3.
Free-swimming speeds of the S. meliloti wild-type strain and 12 chemotaxis mutants without and with stimulation by proline
| Strain | Genotype | Swimming velocity (μm/s)a
|
Chemokinesis (%)b | |
|---|---|---|---|---|
| Without proline | With 10 mM proline | |||
| RU11/001 | Wild type | 37.4 | 40.2 | 7.5 |
| RU13/148 | ΔmcpS | 37.5 | 40.2 | 7.2 |
| RU11/838 | ΔmcpT | 40.1 | 42.7 | 6.5 |
| RU11/828 | ΔmcpU | 33.9 | 36.7 | 8.3 |
| RU11/830 | ΔmcpV | 38.2 | 40.6 | 6.3 |
| RU11/803 | ΔmcpW | 37.9 | 40.1 | 5.8 |
| RU11/805 | ΔmcpX | 38.0 | 41.4 | 8.9 |
| RU11/804 | ΔmcpY | 36.5 | 37.4 | 2.5 |
| RU11/818 | ΔmcpZ | 37.1 | 40.0 | 7.8 |
| RU11/815 | ΔicpA | 38.5 | 39.8 | 3.4 |
| RU13/107 | ΔmcpY ΔicpA | 38.1 | 38.8 | 1.8 |
| RU13/149 | Δ9 (icpASTUVWXYZ) | 40.6 | 40.9 | 0.7 |
| RU11/310 | ΔcheA | 40.0 | 40.2 | 0.5 |
a
Swimming velocity before and after stimulation with proline (10 mM). For each strain, 1,000 individual tracks from at least five independent cell populations were analyzed by the Hobson BacTracker system.
b
Given as the percentage of increase in swimming velocity after stimulation with proline.