Fig. 4: 3C-13C correlation spectra of a 1:1 mixture of 13C-Leu labeled E12–37 and 13C-Val labeled E12–37 in POPC/POPG liposomes.
From: Dimeric Transmembrane Structure of the SARS-CoV-2 E Protein

Data obtained at mixing times of (a) 600 ms and (b) 300 ms. Interhelical cross peaks are assigned. In (a), the signal to noise (S/N) ratios for 13C-Leu and 13C-Val cross peaks are: LCγ-VCα, 5.7; LCβ-VCα, 2.8; and LCα-VCα, 2.5. Interhelical cross peaks with S/N ratios above 2 are usually considered strong.