Describe7 marksChallenge
A mixture containing glycine, lysine, and the dipeptide alanylglycine is placed on an electrophoresis plate at pH 6.0. The isoelectric points of glycine, lysine, and alanylglycine are approximately 6.0, 9.7, and 6.2 respectively.
Describe the acid/base properties of amino acids, including the formation of zwitterions and the meaning of the isoelectric point. Then describe how a peptide bond is formed between two amino acids. Finally, predict the relative movement of each component in the electrophoresis at pH 6.0, stating the charge on each species at this pH.