Secondary structure of protein

Question 1

What is the secondary structure of protein

Answer 1

• Folding of primary structure of proteins into definite shapes.
• Polypeptide chains either fold in on themselves or crosslink with another chains, causing the chains to form a spiral shape.

Question 2

Give an example of how crosslinks give proteins unique properties

Answer 2

gluten’s elasticity

Question 3

Explain Disulfide Bonds

Answer 3

• Occur when 2 sulfurs from 2 amino acids join together from a single or two different polypeptide chain.
  E.g. Cysteine contains sulfur, two cysteine amino acids form a disulfide bonds. Insulin contains disulfide bonds.

Question 4

Explain Hydrogen Bonds

Answer 4

• Occur when a hydrogen (H) from N-H of one amino acid and an oxygen from C=O group of another amino acid join together from a single or two different polypeptide chain.
  E.g. Serine is capable of forming hydrogen bonds. Collagen contains hydrogen bonds.