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Differences in isoelectric points can be used to separate mixtures of amino acids by electrophoresis . When a voltage is applied to a mixture of alanine, lysine and aspartic acid at pH 6.0, the amino acids will separate. Predict the products of the following transformations and using resonance structures explain why different products are formed. Identify A - C. 16. Draw arrows to the peptide bonds and circle the side chain of the constituent amino acids.