natural abundance (unlabeled) - protons only. Complete, confident assignment of very small Trp-cage miniproteins requires only 1H.

Circular Permutation of the Trp-cage: Fold Rescue upon Addition of a Hydrophobic Staple.

Incorporated into the peptide chain as per standard amino acids.

A circular permutant of the Trp-cage, with a 2 residue loop insertion (between previous N and C termini) and a 1 residue excision (of Gly15, to create new N and C termini).

Brunger, Adams, Clore, Gros, Nilges and Read