Table 1.

Average Φ and Ψ angle values for various conformations on the Ramachandran plot (according to Hollingsworth and Karplus) ¹³.

Type	ϕ, ψ Angles
α (alpha helix)	−63, −43
β (beta region)	‒157.2, 161.9
PII-spirals	−65, +145
γ-turns	+80, −80
γ′-turns	−80, +80
δ regions	Extending at 45° angle to the left of α-helix region
δ′ regions	Mirror image of δ region
ζ (pre-proline region)	−130, +80