18. Amino Acids and Proteins

For each of the following proteins, note whether the main secondary structure feature is α helix, β-pleated sheet, or both.

a. collagen

For each of the following proteins, note whether the main secondary structure feature is α helix, β-pleated sheet, or both.

c. hemoglobin

For each of the following proteins, note whether the main secondary structure feature is α helix, β-pleated sheet, or both.

e. hexokinase

Give an example of a protein containing primarily alpha-helices. Is this a fibrous or globular protein?