In α – helix the bonding occurs between oxygen of carbonyl group of one amino acid and hydrogen of amino group ofans.Fourth amino acid next to formerFifth amino acid next to formerSecond amino acid next to formerThird amino acid next to former Previous Marked for Review Next

In an α-helix structure of proteins, the bonding occurs between the oxygen of the carbonyl group of one amino acid and the hydrogen of the amino group of the fourth amino acid next to the former. This is due to the specific folding and coiling of the polypeptide chain in the α-helix structure, which brings the carbonyl oxygen and the amino hydrogen into close proximity, allowing for the formation of a hydrogen bond. This pattern of bonding is repeated along the length of the α-helix, stabilizing its coiled structure.