The α helix of the secondary structure of a protein is held together by ________ between two widely separated parts of a protein chain.

Question

Quizplus · Accepted Answer

The α helix is stabilized by hydrogen bonds between the carbonyl group of one amino acid and the amide group of the fourth amino acid down the chain. These hydrogen bonds occur between two widely separated parts of the protein chain, providing stability to the overall structure. Disulfide bridges, salt bridges, hydrophilic interactions, and hydrophobic interactions can also contribute to protein structure, but they are not specifically involved in forming and stabilizing the α helix.

The α Helix of the Secondary Structure of a Protein