The points in the Ramachandran plot are derived by
A) counting the number of amino acids and placing points in allowed regions.
B) measuring the $\phi$and $\Psi$angles in an experimentally determined protein crystal structure.
C) placing each amino acid in regions commonly occupied by that amino acid.
D) experimentally measuring the optical rotation of polarized light.

Question

The points in the Ramachandran plot are derived by 
A) counting the number of amino acids and placing points in allowed regions. 
B) measuring the $\phi$and $\Psi$angles in an experimentally determined protein crystal structure. 
C) placing each amino acid in regions commonly occupied by that amino acid. 
D) experimentally measuring the optical rotation of polarized light.

Quizplus · Accepted Answer

The Ramachandran plot is derived from experimentally determined protein crystal structures, where the F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10 angles are measured and plotted on the Ramachandran plot. These angles represent the rotations around the peptide bond, which are restricted by steric interactions and hydrogen bonding between backbone atoms. The allowed regions on the plot correspond to regions where these interactions can occur, leading to stable protein structures.

The Points in the Ramachandran Plot Are Derived by ϕ\phiϕ And Ψ\PsiΨ

The Points in the Ramachandran Plot Are Derived by $\phi$ And $\Psi$