Fig. 3: PISEMA spectra of 15N labeled E12–37 peptides in POPC/POPG bilayers.
From: Dimeric Transmembrane Structure of the SARS-CoV-2 E Protein

a 15N-labeling at Ile13 and Ile33. b 15N-labeling at Phe20, Phe23, and Phe26. c 15N-labeling at Ala22, Ala32, and Ala36. d 15N-labeling at Thr30 and Thr35. e 15N-labeling at Val14, Val17, Val24, Val25, and Val29. f 15N-labeling at Leu12, Leu18, Leu19, Leu21, Leu27, Leu28, Leu31, Leu34, and Leu37. Superimposed on the spectra is a PISA wheel calculated at a tilt of 6°. For the Ala spectrum, the calculated PISA wheel used a somewhat larger σ33 of 232.1 ppm.