The Ramachandran plot graphically shows which combinations of torsional angles phi (φ) and psi (ψ) of amino acid residues contained in a peptide are possible. Why are all the theoretical combinations of φ and ψ not possible?

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Biology · Biochemistry

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Two atoms cannot occupy the same space due to steric hindrance.

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Answer 1

Two atoms cannot occupy the same space due to steric hindrance.

Answer 2

The geometry of the peptide bond that links two amino acid residues restricts φ and ψ angles.

Answer 3

Beta sheets and alpha helices determine the allowed regions of conformational space.

Answer 4

The tertiary fold of polypeptides restricts conformational space.

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