TABLE 3.
Concentration factors for several divalent and trivalent cations for B. subtilis as measured by Beveridge and Murray (4)a
| Cation | Concn factor | Reason for concn factor |
|---|---|---|
| Mg2+ | 783 | Specific binding |
| Ca2+ | 38 | Electrostatics (?) |
| Sr2+ | 2.6 | Electrostatics |
| Mn2+ | 76.3 | Specific binding |
| Ni2+ | 10.2 | Electrostatics |
| Pb2+ | 1.9 | Electrostatics |
| Cu2+ | 285 | Specific binding |
| Al3+ | 0 | Metal hydrolysis (?) |
| Fe3+ | 341 | Specific binding |
a
A cell wall volume of 2.1 ml/g (dry weight) of wall was used to transform micromoles per milligram (dry weight of cell fragments) to moles per liter.