The conformation of the backbone of a polypeptide is described completely by the angle(s)of rotation about which bond(s)?
A)The peptide bond only.
B)N-Cα only.
C)N-Cα,Cα-C and C-N bonds.
D)N-Cα and Cα-C bonds only.

Question

Quizplus · Accepted Answer

The conformation of the backbone of a polypeptide is described by the angles of rotation about the N-Cα (phi, φ) and Cα-C (psi, ψ) bonds. The peptide bond itself is planar and does not rotate due to its partial double bond character.

The Conformation of the Backbone of a Polypeptide Is Described