Consider a mixture of the amino acids lysine (pI = 9.7), tyrosine (pI = 5.7), and glutamic acid (pI = 3.2) at a pH 5.7 that is subjected to an electric current. ________ will remain stationary.

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Quizplus · Accepted Answer

At a pH of 5.7, tyrosine would be in its zwitterionic form and have no net charge. Therefore, it would not migrate under an electric current and would remain stationary. Lysine would be positively charged and glutamic acid would be negatively charged, both of which would migrate towards the cathode and anode, respectively.

Consider a Mixture of the Amino Acids Lysine (PI =