Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
χzzz/χxxz ratios for (a) the unlabeled segment of an ideal alpha helix and (b) the isotope labeled peak, assuming full rotational averaging around the helix axis. (c) Contours indicating ψ/θ pairs giving the experimentally-measured values for the unlabeled and labeled peak χzzz/χxxz ratios. In this figure, the tilt angle θ indicates the angle between the helix axis and the surface normal.
