Table 1 |
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Approximate total concentration of key ions in various environments (in moles/litre). |
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Ion |
Modern sea water |
Blood plasma |
Cell cytoplasm |
|
|
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Na+ |
0.4 |
0.14 |
0.01 |
|
|
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K+ |
0.01 |
0.005 |
0.1 |
|
|
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Ca2+ |
0.01 |
0.002 |
0.001 |
|
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Mg2+ |
0.05 |
0.001 |
0.01 |
|
|
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Fe |
10-8 (mostly Fe3+) |
10-5 |
10-3–10-4 |
|
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Mn2+ |
10-8 |
10-8 |
10-6 |
|
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Zn2+ |
10-9 |
10-5 |
10-3–10-4 |
|
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Cu |
10-9 (Cu2+) |
10-5 |
10-5 |
|
|
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Cl- |
0.5 |
0.1 |
0.1 |
|
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The table is compiled from data presented in [90,102,172,173]. |
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Mulkidjanian Biology Direct 2009 4:26 doi:10.1186/1745-6150-4-26 |
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