?The velocity v with which a protein moves through water under the influence of an

Chapter 14, Problem E14E.1(a)

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The velocity v with which a protein moves through water under the influence of an electric field varied with values of pH in the range 3.0<pH<7.0 according to the expression \(v /\left(\mu \mathrm{m} \mathrm{s}^{-1}\right)=a+b(\mathrm{pH})+c(\mathrm{pH})^{2}+d(\mathrm{pH})^{3}\) with a=0.50, b=-0.10, \(c=-3.0 \times 10^{-3}\), and \(d=5.0 \times 10^{-4}\). Identify the isoelectric point of the protein.

Text Transcription:

v/(mu m s^-1=a+b(pH})+c(pH)^2+d(pH)^3

c=-3.0 times 10^-3

d=5.0 times 10^-4