. Author manuscript; available in PMC: 2013 Jul 1.

Published in final edited form as: Proteins. 2012 Apr 13;80(7):1715–1735. doi: 10.1002/prot.24065

Table I.

Mean and standard deviation of four H-bond features in α-helix and β-sheet structures.

Acceptor i, donor j		D(O_i,H_j) (Å)	A(C_i,O_i,H_j) (°)	A(O_i,H_j,N_j) (°)	T(C_i,O_i,H_j,N_j) (°)
T₁	Helix, j=i+4	2.00/0.53	147/10.58	159/11.25	160/25.36
T₂	Helix, j=i+3	2.85/0.32	89/7.70	111/8.98	−160/7.93
T₃	Parallel	2.00/0.30	155/11.77	164/11.29	180/68.96
T₄	Antiparallel	2.00/0.26	151/12.38	163/11.02	−168/69.17