From the Bax Group at the National Institutes of Health ...
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Prediction of Protein Helix Capping Motifs and Beta-turns from Chemical Shifts
As described in the paper:
Identification of helix capping motifs and beta-turns from NMR chemical shifts
Yang Shen, and Ad Bax.
J. Biomol. NMR, 52, 211-232 (2012)