Which one of the following amino acids is most compatible with an a-helical structure?

Q. Which one of the following amino acids is most compatible with an a-helical structure?
A. Tryptophan
B. Alanine
C. Leucine
D. Proline
Answer: Alanine

A. Tryptophan
B. Alanine
C. Leucine
D. Proline
Answer: Alanine