Table 1.

Numerical values of the internal angles and dihedral coordinates in the all-atom and CG representation. Typical values for secondary structures are reported. Data for ϕ and ψ were taken from textbooks[19, 20], the corresponding structures were built with the biopolymer module of Insight (MSI/Accelrys) and from those structures the θ and α angles were measured.

structure	ϕ	ψ	θ	α
extended	180	180	146	180
βsheet anti-parallel	−139	135	131	179
βsheet parallel ideal	−120	120	121	178
βsheet parallel	−120	113	119	177
fat ribbon	−78	59	92	163
α helix	−57	−47	92	52
3–10 helix	−49	−29	85	81
π helix	−57	−70	99	27
6-membered ring ideal	180	0	115	0
5-membered ring ideal	−75	−75	105	0
5-membered ring	−60	−105	108	0
α helix left handed	57	47	92	−52
collagen triple helix	−51	153	117	−77
polypro-polygly left helix	−79	150	121	−109