Number of K ions

Range 1.8×10^8-2×10^8 Copies/cell
Organism Bacteria Escherichia coli
Reference Calculated from concentration of 180-200 mM (primary source)
Primary Source Shabala L, Bowman J, Brown J, Ross T, McMeekin T, Shabala S. Ion transport and osmotic adjustment in Escherichia coli in response to ionic and non-ionic osmotica. Environ Microbiol. 2009 Jan11(1):137-48.PubMed ID18793315
Method Concentration of 1nM in a cell volume of 1 um^3 corresponds to one molecule/cell (BNID 102 068), concentration of K+ ions of 180-200 mM (BNID 104049) corresponds to 1.8X10^8-2X10^8 molecules/cell. Measurement method of primary source: non-invasive microelectrode ion flux (MIFE) measurement technique.
Comments Under range of 0.3-3.5 Os×Kg^-1 External osmolality of sucrose in medium. See figure 3. K+ is the most abundant inorganic ion in the (non-halophilic) cell cytosol (a typical concentration of ~200 mM)
Entered by Ron Milo, Paul Jorgensen, Mike Springer
ID 100126