I need help with this question. I think the answer is Glutamic Acid due to this being the only amino acid provided in this question that has a pKa value for its side chain, and it being less than pH so I think it would have a negative charge. That is the only difference I could find between any of the listed amino acids.

Based on the structure of these amino acids at pH 7, determine what non-covalent interaction each amino acid side chain can participate in. For which amino acid, would its side chain interaction release the most energy upon formation? (2 points) Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Glutamine b Glutamic acid Leucine d Proline e Glutamine and glutamic acid would be about the same f All of the amino acids would be about the same g energy is required when bonds are formed, not released