The DQB1-TMD sequence used to record the spectra shown in Figure 6C was labelled at the Leu position 15. Therefore, the Figure caption 6 should read: Figure 6: Solid-state NMR spectra of [ 15 N-G 15 , 2 H 3 -A 9 ]-DQA1 (A,B) or [ 15 N-L 15 ]-DQB1 (C,D) reconstituted into DMPC/DHPC bicelles (q = 3.2). Proton-decoupled 15 N (A, C) and 31 P (B, D) spectra are shown. Temperature 37 °C. The magnetic field is 17.6 Tesla. Correspondingly on page 64 the text changes to: In comparison, the related sequence [ 15 N-L 15 ]-DQB1 shows a strong intensity at 90 ± 5 ppm (Fig. 6C). The authors would like to apologise for any inconvenience caused.