Calcium concentration in the ECF or in the lumen of intracellular reticular systems

Range 2 to 5 mM
Organism Unspecified
Reference Editor: Dr. Robert A. Meyers, Encyclopedia of Molecular Cell Biology and Molecular Medicine, Joachim Krebs, Calcium Biochemistry, p.136 left column
Comments In the ECF (ExtraCellular Fluid) or in the lumen of intracellular reticular systems, the calcium concentration is millimolar (2–5 mM, of which about 50% is unbound, i.e. corresponds to free Ca2+ concentration), whereas the cytosolic free Ca2+ concentration of a resting cell is about 100 to 300 nM.
Entered by Uri M
ID 107491