Phi and Psi angles Flashcards by Milly Cooke | Brainscape

Q

What is a PHI angle?

A

polypeptide chain can rotate around the N-C bond

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Q

What is a PSI angle?

A

polypeptide chain can rotate about C-CO bond

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Q

How would you show combinations of PHI and PSI angles?

A

in a Ramachandran plot
some forbidden angles due to steric clashes
glycine PHI and PSI angles aren’t restricted to the plot

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