2. In the space provided, draw the structure of valine (val) at each of the following pH values. Valine has a pl of 5.97. CH₁ CH-CH, H₂N-C-COOH H a) pH = 4.34 Valine (Val) b) pH = 5.97

What characteristics indicate that amino acids exist as zwitterions?

For the tripeptide SerArgIle which amino acid residues a. are hydrophilic b. are hydrophobic c. possess polar neutral R groups d. participate in two amide linkages

Consider the tripeptide leucylvalyltryptophan. a. Specify its structure using three-letter symbols for the amino acids. b. How many peptide bonds are present within the peptide? c. Which of the amino acid residues has the largest R group? d. Which of the amino acid residues, if any, has a basic side chain?

In the space provided, draw the structure of valine (val) at each of the following pH values. Valine has a pl of 5.97. a) pH = 4.34 CH3 CH-CH, H2N-C-COOH Valine (Val) b) pH = 5.97 %3D

Draw the sequential transition of glutamic acid as it passes from its fully protonated form to its fully deprotonated form as the pH rises. If the pH of an amino acid solution is lowered by adding an acid, like , the group of glutamic acid accepts the proton, acid, to form a positive ion.

What type of amino acid has a side chain that contains –COO–? polar neutral nonpolar acidic basic conjugate basic

Please don't provide handwritten solution ..

2. Classify the following amino acids as nonpolar, polar basic, polar acidic, or polar neutral. (a) (b) (c) (d) H₂N-CH-COH CH-OH I CH3 || H₂N-CH-C-OH I CH₂ C=O 1 OH H₂N-CH-C-OH CH₂ T CH-CH3 CH₂ H₂N-CH-C-OH ī CH₂ OH 229

Write the conjugate acid of CH3CH3O-