Question

A Ramachandran plot shows:
a. the amino acid residues which have the greatest degree of rotational freedom.
b. the sterically allowed rotational angles between R groups and -carbons in a peptide.
c. the sterically allowed rotational angles between and the amide nitrogen (-N) as well as between and the amide carbonyl carbon (-CO).
d. the sterically allowed rotational angles about the amide nitrogen (NH) and CO.
e. the amino acid residues that form -helix, -sheet, etc.

Answer

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