1H-NMR spectra. 1H-NMR spectra of A) virus suspension in D2O, 295 K (2.109/μL), with expanded plots of the 5-6 ppm region, left. B) Same conditions as in A after addition of 50 μL DPPG, 2.7 mM, D2O. C) same as B), with 100 μL total amount of DPPG. D) spectrum of pure SUV-DPPG with expanded 5-6 ppm region presented in the left column.