TABLE 4.
Shape effects on the energetics of bacterial chemotaxis
| Cell diam (μm) | Relative energy required to move cellsa
|
|||
|---|---|---|---|---|
| Chemotaxis search | Chemotaxis along a gradient of length:
|
|||
| 100 μm | 1 mm | 1 cm | ||
| 0.4 | 1 | 1 | 30 | >103 |
| 1.0 | 5 | 10 | 10 | 10 |
| 1.6 | 20 | |||
| 2.0 | 40 | 100 | 100 | 100 |
a
Energy amounts are expressed relative to the energy required to move a cell of 0.4 μm in diameter and are restated from values graphed in Fig. 2B and 3B in reference 217. The absolute values of the unit amount of energy are different for the chemotaxis search and for chemotaxis along a gradient. The values are rounded and are for comparison purposes only (see reference 217 for the absolute values). Note that cell dimensions in this table are stated as cell diameters, whereas cell radii are reported in the original figures (217).