The Effect of Protein Concentration on Electrophoretic Mobility

✍ Scribed by Agnes K. Ho; Jilska M. Perera; Geoffrey W. Stevens

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 109 KB
• Volume: 224
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1999.6658

✦ Synopsis

The electrophoretic mobility of haemoglobin was measured in a novel membrane-electrophoresis cell and by electrophoretic light scattering. The effect of protein concentration was investigated at different ionic strengths in two different buffer systems. The results indicated that although the effect of the concentration is weak, the mobility did decrease linearly with an increase in volume fraction throughout the range of volume fractions investigated (φ < 0.06). This dependence is more pronounced at lower κa values where double-layer interactions between the particles are more significant. Protein contribution to the solution ionic strength alone cannot explain the observed reduction in electrophoretic mobility. The theory of Shugai et al. (Shugai, A