試題詳解

18. Thr and/or Leu residues tend to disrupt an a helix when they occur next to each other in a protein because:
(A) of electrostatic repulsion between the Thr and/or Leu side chains.
(B)of steric hindrance between the bulky Thr and/or Leu side chains.5 ㆍ
(C) both amino acids are highly hydrophobic.
(D) the R group of neither amino acid can form a hydrogen bond.
(E) of the possible covalent interactions between the Thr and/or Leu side chains.