A chiral molecule is one that is not superposable on its mirror image, thus a chiral carbon is a carbon atom with 4 different groups attached into it. In the ff: structures below, using asterisk (*) to mark the chiral carbon. (Hint: There can be more than 1 chiral center in a molecule) он но он (a) (c) HO OH Он Lactic acid Ascorbic acid (vitamin C) Он он но. (b) (d) HO Glyceraldehyde Estradiol (an estrogen)
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- Label the chiral carbon atom(s) with asterisk (*).What type of intermolecular forces mainly exist between the side chains of each of the following pairs of amino acids? Select the single best answer for each part below. Note: Reference the Naturally-occurring amino acids table for additional information. Part 1 of 3Amino acids are the building blocks for proteins in the cell. The structures of the amino acids glutamate (or glutamic acid), glycine, and leucine are provided below in the same order from left to right. Map any chiral centers with a 1.
- Draw the structures of the products formed by hydrolysis of the following tripeptide at physiological pH. Val-Gly-Ile Note: Reference the Naturally occurring amino acids data table for additional information. Click and drag to start drawing a structure.The pH of the amino acid shown below is:Consider the protein below: HO HỘ NH CH-OH CH Identify/Name the noncovalent interaction between groups in the following locations: Σ
- For the protein given in the attached picture: Write the name of these 5 amino acids corresponding to their abbreviation of 3 letters. Describe precisely how the functional groups in the amino acids are involved in bonding between two successive amino acids in the protein.Aspartic acid has a side chain bearing a carboxylic acid group; its pkg is ~4. The alpha-carboxylic and alpha-amino groups have pk, values similar to those of alanine, ~ 2 and ~9, respectively. Determine the net charge on an aspartic acid molecule at the following pH values (match each pH to the best choice). pH = 1 +1 pH = 2 +1 pH = 4 pH = 7 -1 pH = 9 -2 pH = 13 -2 > > >Many bioactive compounds are derived from amino acids. This compound, found in trace amounts in mammalian brains and hypothesized to play a role as a neuromodulator or neurotransmitter, is derived from an amino acid through removal of the backbone carboxylic acid group. The amino acid from which it is derived must be: (Write out the entire name; Spelling matters, but case does not; Do not include L- or D- in the name; For acidic amino acids write the full name, e.g. “so-and-so acid”)
- Aspartic acid has a side chain bearing a carboxylic acid group; its pK, is ~4. The alpha-carboxylic and alpha-amino groups have pk, values similar to those of alanine, - 2 and ~9, respectively. Determine the net charge on an aspartic acid molecule at the following pH values (match each pH to the best choice). pH = 1 [ Choose ] pH = 2 [ Choose ] pH = 4 [ Choose ] pH = 7 [ Choose ] pH = 9 [ Choose ] pH = 13 [ Choose ] > > >pI is the pH at which an amino acid exists as a zwitterion. A zwitterion has both a plus and minus charge so it is neutral overall. If the pH of a solution of tyrosine is much larger than the pI of tyrosine, which structure below represents the correct protonation state of tyrosine (tyrosine pI is 5.66; the pH of the tyrosine solution is 8.0)? NH NH H,N. HN. HO, OH но но но HO A В DFor each of the following pairs of amino acids, identify the strongest type of intermolecular forces involved when the side chains interact. Explain in terms of the chemical structures of the amino acid side chains. Use the following list: disulfide bridge, hydrogen bonding, hydrophobic interaction, or salt bridge. a) D and H b) C and C c) L and A d) G and S e) N and T