Figure 1. 2D ¹⁵N-¹H HSQC spectrum of the ERp27 b domain.

Peaks are annotated to show the backbone amide assignments. All 110 non-proline residues have been assigned. The indole ϵ1 amide of the single tryptophan residue (W42) has also been assigned. Side-chain amide NH₂ resonances are connected with horizontal lines.