How would you identify a beta turn in a protein structure?

• A. Look for a sequence of 6 amino acids with hydrophobic interactions.
• B. Look for a sequence of less than 4 amino acids with internal hydrogen bonds.
• C. Look for a sequence of more than 10 amino acids without hydrogen bonds.
• D. Look for a sequence of 4 amino acids forming a disulfide bond.

Answer: (B)