Direction: The width of the lipid bilayer membrane is 30 Å. It is permeated by a protein which is a right handed
α-helix.
-
The number of amino acid residues present in the protein is
-
- 15
- 18
- 17
- 20
- 15
Correct Option: D
We know, the right handed α-helix has 3.6 residues per turn in the helix.
But number of helix turns = 5.6
Therefore, No. of amino acids present in the protein = 5.6 * 3.6 = 20
Therefore, No. of amino acid residues present in the protein is 20.