Answer to Question #149488 in Biochemistry for Titomi

Question

1. Calculate the isoelectric point of glutamic acid. How does the isoelectric point of glutamic acid differ from glycine.
2. Illustrate the titration curve of lysine showing the cation, zwitterion and anion on the curve.

Answer 1

Glutamic Acid pH is2.19 .

If acid is added to a solution containing thezwitterion, the carboxylate group captures a hydrogen (H+) ion, and the amino acidbecomes positively charged. If base is added, ion removal of the H+ ion from the amino group of the zwitterion produces a negatively charged amino acid.