This video was created using models, images, and inspiration from the Proteopedia page: The Ramachandran Principle Phi (φ) and Psi (ψ) Angles in Proteins

https://proteopedia.org/wiki/index.ph...

REFERENCES:
• Ramachandran, G.N.; Ramakrishnan, C.; Sasisekharan, V. (1963). "Stereochemistry of polypeptide chain configurations". Journal of Molecular Biology. 7: 95–9.
• Prilusky J, Hodis E, Canner D, Decatur W, Oberholser K, Martz E, Berchanski A, Harel M, Sussman JL. Proteopedia: A status report on the collaborative, 3D web-encyclopedia of proteins and other biomolecules. J Struct Biol. 2011 Apr 23. PMID:21536137 doi:10.1016/j.jsb.2011.04.011