In the diagram below, the plane drawn behind the peptide bond indicates the: A) absence of rotation around the C-N bond because of its partial double-bond character. B) plane of rotation around the C _$\alpha$ -N bond. C) region of steric hindrance determined by the large C=O group. D) region of the peptide bond that contributes to a Ramachandran plot. E) theoretical space between -180 and +180 degrees that can be occupied by the $\phi$ and$\Psi$angles in the peptide bond.

Question

Quizplus · Accepted Answer

The plane drawn behind the peptide bond indicates the absence of rotation around the C-N bond because of its partial double-bond character. This is due to the resonance between the C=O and N-H groups, which leads to a planar configuration and limits the rotation around this bond.

In the Diagram Below, the Plane Drawn Behind the Peptide α\alphaα

In the Diagram Below, the Plane Drawn Behind the Peptide $\alpha$