TABLE 2.
Chemical constituents of various fractions of EPS from cells of T. ferrooxidansa
| EPS fraction | Constituentb | % (wt/vol) of total EPS from cells grown on:
|
||
|---|---|---|---|---|
| Iron(II) sulfate | Pyrite | Sulfur | ||
| Sugar | Rhamnose | 13.9 | 10.8 | NDc |
| Fucose | 20.5 | 17.1 | ND | |
| Xylose | 0.9 | 0.8 | ND | |
| Mannose | 0.4 | 0.7 | ND | |
| Glucose | 11.4 | 15.2 | 40.4 | |
| Glucuronic acid | 4.4 | 3.3 | 0.6 | |
| Iron(III) ions | 0.7 | 0.5 | ND | |
| Lipid | C12:0 | 1.9 | 2.0 | 2.7 |
| C14:0 | 0.4 | 0.4 | 0.6 | |
| C16:0 | 8.8 | 9.4 | 12.9 | |
| C17:0 | 0.9 | 1.0 | 1.3 | |
| C18:0 | 20.2 | 21.6 | 29.5 | |
| C19:0 | 3.9 | 4.2 | 5.7 | |
| C20:0 | 0.8 | 0.8 | 1.1 | |
| FFA | C16:0 | 1.7 | 1.8 | 2.4 |
| C18:0 | 3.8 | 4.0 | 5.6 | |
a
T. ferrooxidans cells were grown with iron(II) sulfate, pyrite, or sulfur. Experiments were carried out in triplicate. Results are given as arithmetic mean values. SD amount to 4%.
b
C’s with subscripts show equivalent chain lengths of fatty acids.
c
ND, not detected (<0.08%).