Arginine has an isoelectric point of 10.76. At which pH would the predominate form of arginine in solution migrate toward the positive terminal during electrophoresis?

Question

Quizplus · Accepted Answer

At a pH lower than the isoelectric point of arginine (10.76), the predominant form of arginine in solution carries a net positive charge and would migrate toward the negative terminal during electrophoresis. At a pH higher than the isoelectric point, the predominant form of arginine in solution carries a net negative charge and would migrate toward the positive terminal during electrophoresis. Therefore, at a high pH of 12, the predominant form of arginine in solution would be positively charged and migrate toward the positive terminal.

Arginine Has an Isoelectric Point of 10