Question

question 3 · 1 point
which amino acid from the following list best fits the alpha helix?
select the correct answer below:
lysine
alanine
glycine
serine

Explanation:

Alanine has a small non - polar side chain. Small non - polar amino acids like alanine tend to fit well into the alpha helix structure. Glycine is too flexible (due to its lack of a side chain) and can disrupt the helix. Lysine has a charged side chain which can cause electrostatic repulsions or attractions that may disrupt the helix. Serine has a polar side chain which can also disrupt the hydrophobic core of the alpha helix (if it is part of a protein with a hydrophobic core in the helix region). So, alanine is the best fit among the given options.

Answer:

alanine