Table 4. Frequencies of intra-turn hydrogen bond formations.

Atom involved	Full-length ProTαa	32-mer Neh2a
mcb i to mc i+2		0.196%
mc i to mc i+3		3.844%
mc i to sc i+3		27.808%
mc i+2 to sc i+3	0.284%	0.204%
scc i to mc i+2	0.396%	55.368%
sc i to mc i+3	6.696%	77.524%
sc i+1 to mc i+2		0.428%
sc i to sc i+3		80.212%
sc i+2 to sc i+3	7.316%	0.572%
Intra-turn total	14.348%	98.644%

^aEach frame from the last 0.1 µs of the mouse full-length ProTα and 32-mer Neh2 trajectories were used for the hydrogen bond calculations (25,000 structures). A hydrogen bond between a hydrogen donor (D–H) and a hydrogen acceptor (A) was judged to be formed when the DA distance (r) was less than 3.2 Å and the angle between the DA vector and the D–H bond (AD-H angle) was less than 35°.For clarity, only hydrogen bonds occur in more than 0.1% of the structures are listed and intra-residue hydrogen bonds are excluded.

^bmc – main chain atoms.

^csc – side chain atoms.