It is a very uniform geometric structure with 3.6 amino acids in each turn of the helix:
Correct answer: A. α-helix
- A. α-helix
- B. β-helix
- C. α-pleated sheet
- D. β-pleated sheet
Explanation
Alpha helix is also called a classic Pauling-Corey-Branson α-helix. The 3.613 is also used for this type of helix denoting the average number of residues per helical turn, with 13 atoms being involved in the ring formed by the hydrogen bond.
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