title: 270-MHz nuclear-magnetic-resonance study on linear gramicidin A in dimethylsulfoxide. A new interpretation.
abstract: On the basis of the finding of two sets of coupling constants (8.8 Hz and 6.7 Hz) in the 270-MHz proton magnetic resonance spectra of linear Gramicidin in dimethylsulfoxide and the comparison of its infrared spectrum with those of known conformations of alternating poly(gamma-benzyl-D-glutamate--gamma-benzyl-L-glutamate), it is proposed that the antibiotic has an LD-ribbon structure.
mesh_terms: D004121:Dimethyl Sulfoxide; D006096:Gramicidin; D009682:Magnetic Resonance Spectroscopy; D011487:Protein Conformation
chemical_list: D006096:Gramicidin; D004121:Dimethyl Sulfoxide