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Updated: Jun 2, 2026

Cell-based Calcium Assay for Medium to High Throughput Screening of TRP Channel Functions using FlexStation 3
Published on: August 17, 2011
Binding of calcium to serum albumin. III. Influence of ionic strength and ionic medium
1Dept. of Clinical Chemistry, Arhus Kommunehospital, Arhus, Denmark.
Abstract:
A marked inverse relation between calcium binding to serum albumin and ionic strength has been demonstrated by means of an ultrafiltration method and shown to be identical in NaCl and KCI medium, while magnesium binds competitively to albumin with the same affinity as calcium ions. The ionic strength dependence has been resolved into a linear relation between log calcium ion activity coefficient and log apparent intrinsic association constant, whose extrapolated value at zero ionic strength of supporting electrolyte is 1445±67 litres/mole. The importance of constant ionic strength in binding studies is emphasized.
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