Identification of N-terminal helix capping boxes by means of 13C chemical shifts.


We have examined the 13C alpha and 13C beta chemical shifts of a number of proteins and found that their values at the N-terminal end of a helix provide a good predictor for the presence of a capping box. A capping box consists of a hydrogen-bonded cycle of four amino acids in which the side chain of the N-cap residue forms a hydrogen bond with the backbone… (More)

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