title: Study of internal rotations in gramicidin S by means of carbon-13 spin-lattice relaxation measurements.
mesh_terms: D002247:Carbon Isotopes; D005583:Fourier Analysis; D006096:Gramicidin; D009682:Magnetic Resonance Spectroscopy; D008722:Methods; D011487:Protein Conformation; D013329:Structure-Activity Relationship
chemical_list: D002247:Carbon Isotopes; D006096:Gramicidin