Albumin fraction and measurement of total protein concentration

B. T. Peterson and R. W. Tate Department of Physiology, University of Texas Health Center, Tyler 75710. The standard curve of a typical colorimetric assay for total protein is often nonlinear and dependent on the albumin fraction of the protein standard. We developed a simple mathematical transforma...

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Veröffentlicht in:American journal of physiology. Heart and circulatory physiology 1993-05, Vol.264 (5), p.H1723-H1726
Hauptverfasser: Peterson, B. T, Tate, R. W
Format: Artikel
Sprache:eng
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Zusammenfassung:B. T. Peterson and R. W. Tate Department of Physiology, University of Texas Health Center, Tyler 75710. The standard curve of a typical colorimetric assay for total protein is often nonlinear and dependent on the albumin fraction of the protein standard. We developed a simple mathematical transformation to make the standard curve linear and a computational method to correct for differences in albumin concentrations among the samples. This method uses data from total protein assays on two sets of standards (albumin and gamma globulin) and provides accurate measures of total protein over the full range of albumin fractions. Comparison of this two-standard method with the a method that uses only albumin as a standard shows that this method prevents physiologically significant overestimations in total protein concentration and calculated protein osmotic pressure differences in the lungs.
ISSN:0363-6135
0002-9513
1522-1539
DOI:10.1152/ajpheart.1993.264.5.h1723