What happens to glutamic acid 35 and aspartic acid 52 at the end of the reaction? Choose one: A. Glutamic acid is deprotonated and negatively charged. B. Lysozyme is destroyed and recycled as the product is released. C. Both amino acids are restored to their original forms. D. Aspartic acid has formed a covalent bond with the first sugar.
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21. Which of the following statements is TRUE when aspartic acid in a protein is positioned in proximity with glutamic acid? a. The pKa of aspartic acid is unaffected b. The protein dissociation from aspartic acid side chain is favored c. The pKa of aspartic acid is increased d. The pKa of aspartic acid is decreased
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What form of glutamic acid would you expect to predominate in (a) strongly acidic solution, (b) strongly basic solution, and (c) at its isoelectric point $(p I=3.2) ?$ (d) The isoelectric point of glutamine $(p I=5.7)$ is considerably higher than that of glutamic acid. Explain.
At neutral $\mathrm{pH}$, which of the following amino acids has a net positive charge, which has a net negative charge, and which is neutral? (Hint: Draw the various charged forms of each amino acid before deciding.) (a) Aspartic acid (b) Histidine (c) Valine
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