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Steady‐state concentration distribution of ampholytes in isoelectric focusing in a linear immobilized pH gradient
Author(s) -
Stoyanov Alexander V.,
Righetti Pier Giorgio
Publication year - 1998
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.1150191013
Subject(s) - isoelectric focusing , chemistry , steady state (chemistry) , immobilized ph gradient , chromatography , gaussian , analytical chemistry (journal) , concentration gradient , sample (material) , constant (computer programming) , electrophoresis , conductivity , distribution (mathematics) , linear relationship , mathematics , mathematical analysis , biochemistry , computational chemistry , statistics , computer science , programming language , enzyme
The equation of balance between electrophoretic and diffusional mass flows in the steady state of isoelectric focusing is analyzed. To create the pH gradient, a model system composed of only one Immobiline is used. The solution is found for the case of a small sample concentration, but without assumptions about linear “focusing force” and constant (linear) conductivity profiles. The effect of sample concentration on the final concentration profile is also evaluated. At high sample concentrations, it is demonstrated that the steady‐state distribution is essentially non‐Gaussian and results in a considerably lower concentration maximum as compared with low sample levels.